Method for obtaining the activity of radioactive material and product

Abstract

The application provides a kind of radioactive material activity acquisition method and product, and the activity acquisition method includes using multiple muons to carry out scattering imaging scanning to radioactive material container, obtains the muon scanning information of radioactive material container;According to muon scanning information, the density distribution data of radioactive material in radioactive material container is determined;Based on the density distribution data of radioactive material in radioactive material container, the efficiency calibration of radioactive material container is carried out by passive efficiency calibration software, and the efficiency calibration data of radioactive material container is obtained;According to the efficiency calibration data of radioactive material container, the activity of radioactive material in radioactive material container is determined.The application can improve the accuracy of radioactive material container efficiency calibration and improve the accuracy of determining the activity of radioactive material according to the density distribution data of radioactive material determined based on the muon scattering imaging scanning information of radioactive material container.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radioactive material processing, and particularly relates to a method for obtaining activity of radioactive material and a product. BACKGROUND

[0002] A large amount of low-level radioactive material is generated in the operation process of a nuclear power plant. Before the radioactive material is finally disposed, the activity of the radioactive material is reconstructed by detecting gamma (γ) rays released by the radioactive material itself or detecting radioactive energy generated by external nuclear reactions to stimulate the radioactive material. Regardless of which activity reconstruction method is used, the efficiency of the radioactive material container storing the radioactive material must be calibrated first. The accuracy of the efficiency calibration of the radioactive material container directly affects the accuracy of the activity reconstruction of the radioactive material.

[0003] At present, the efficiency calibration method is mostly based on passive efficiency calibration. This method often assumes that the radioactive material is uniformly distributed in the radioactive material container, that is, the influence of the density distribution of the radioactive material in the radioactive material container on the efficiency calibration is not considered, resulting in low accuracy of the efficiency calibration and inability to guarantee the accuracy of the reconstructed activity value of the radioactive material. How to improve the efficiency calibration accuracy of the radioactive material container and the accuracy of the activity reconstruction of the radioactive material is a problem to be solved. SUMMARY

[0004] The main purpose of the embodiments of the present application is to provide a method for obtaining activity of radioactive material and a product, which aims to improve the efficiency calibration accuracy of the radioactive material container and the accuracy of determining the activity of the radioactive material.

[0005] The present application provides a method for obtaining activity of radioactive material, comprising: performing scatter imaging scanning on a radioactive material container by using a plurality of muons to obtain muon scanning information of the radioactive material container; determining density distribution data of radioactive material in the radioactive material container according to the muon scanning information; the muon scanning information is scanning information obtained by performing scatter imaging scanning on the radioactive material container by using a plurality of muons; performing efficiency calibration on the radioactive material container by using passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container to obtain efficiency calibration data of the radioactive material container; and determining activity of the radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container.

[0006] In one embodiment, the muon scanning information includes a first track of each muon in the plurality of muons detected by a first detector and a second track of each muon detected by a second detector, the first detector and the second detector are located at opposite sides of the radioactive material container, the intersection of the first track of each muon and the radioactive material container is an incident point of each muon on the radioactive material container, the intersection of the second track of each muon and the radioactive material container is an exit point of each muon on the radioactive material container, the step of determining the density distribution data of the radioactive material in the radioactive material container based on the muon scanning information of the radioactive material container includes: determining a scattering point of each muon in the radioactive material container as a midpoint of a common perpendicular line of the first track and the second track of each muon, determining a track of each muon through the radioactive material container based on the incident point, the exit point and the scattering point of each muon on the radioactive material container, dividing the radioactive material container into a plurality of spatial units, determining a target track count value of the plurality of spatial units according to the distance between the track of each muon through the radioactive material container and the plurality of spatial units, and determining the density distribution data of the radioactive material in the radioactive material container according to the target track count value of the plurality of spatial units, the volume and the mass of the radioactive material container.

[0007] In an embodiment, the step of determining the target track count values of the plurality of spatial units according to the distances between the tracks of each muon passing through the radioactive material container and the plurality of spatial units comprises: selecting an ith1 time period and an ith2 time period from the time period in which each muon is detected by the first detector to have entered the radioactive material container based on an ith time length; wherein the ith1 time period and the ith2 time period are continuous in time and each has a length of the ith time length; determining ith1 track count values of the plurality of spatial units according to the distances between the tracks of each muon passing through the radioactive material container and the plurality of spatial units in the ith1 time period; determining ith2 track count values of the plurality of spatial units according to the distances between the tracks of each muon passing through the radioactive material container and the plurality of spatial units in the ith2 time period; obtaining errors of the ith1 track count values and the ith2 track count values of the plurality of spatial units, respectively; if the errors of the ith1 track count values and the ith2 track count values of the plurality of spatial units all conform to a preset range, taking the ith1 track count values or the ith2 track count values of the plurality of spatial units as the target track count values of the plurality of spatial units; if any of the errors of the ith1 track count values and the ith2 track count values of the plurality of spatial units does not conform to the preset range, updating i to i+1 and returning to perform the step of selecting the ith1 time period and the ith2 time period from the time period in which each muon is detected by the first detector to have entered the radioactive material container based on the ith time length.

[0008] In an embodiment, the step of determining the ith1 track count values of the plurality of spatial units according to the distances between the tracks of each muon passing through the radioactive material container and the plurality of spatial units in the ith1 time period, or the step of determining the ith2 track count values of the plurality of spatial units according to the distances between the tracks of each muon passing through the radioactive material container and the plurality of spatial units in the ith2 time period comprises: obtaining the first distance to the mth distance between the tracks of the first muon to the mth muon passing through the radioactive material container and the first spatial unit in the ith1 time period, respectively; wherein m is the number of the muons detected by the first detector in the ith1 time period. n n ​a total number of muons entering the radioactive material container in a time period; determining a first track count value to an mth track count value of the first spatial unit according to a relationship between the first distance to the mth distance and a distance threshold of the first spatial unit, respectively; wherein, if an rth distance of the first spatial unit is less than the distance threshold of the first spatial unit, an rth track count value of the first spatial unit is 1, 1≤r≤m; if a tth distance of the first spatial unit is greater than or equal to the distance threshold of the first spatial unit, a tth track count value of the first spatial unit is 0, 1≤t≤m; summing the first track count value to the mth track count value of the first spatial unit to determine an ith track count value of the first spatial unit; wherein, i n = i1 or i2, the first spatial unit is any spatial unit in the plurality of spatial units. n

[0009] In an embodiment, the track of each muon passing through the radioactive material container includes an incident track and an exit track of each muon; wherein, the incident track of each muon is a straight line connecting an incident point of each muon on the radioactive material container and a scattering point of each muon in the radioactive material container, and the exit track of each muon is a straight line connecting an exit point of each muon on the radioactive material container and the scattering point of each muon in the radioactive material container; before the step of determining the target track count value of the plurality of spatial units according to the track of each muon passing through the radioactive material container and the distance between the track and the plurality of spatial units, comprising: calculating a first distance between a center point of a target spatial unit and the incident track of a target muon, and a second distance between the center point of the target spatial unit and the exit track of the target muon, respectively; selecting a maximum value between the first distance and the second distance as the distance between the track of the target muon passing through the radioactive material container and the target spatial unit; wherein, the target spatial unit is any spatial unit in the plurality of spatial units, and the target muon is any muon in the plurality of muons.

[0010] In an embodiment, the step of determining the density distribution data of the radioactive material in the radioactive material container according to the target track count value of the plurality of spatial units, the volume and the mass of the radioactive material container, comprises: determining a total density of the radioactive material in the radioactive material container according to the volume and the mass of the radioactive material container; determining a density proportion of the plurality of spatial units of the radioactive material in the radioactive material container according to the target track count value of the plurality of spatial units; and determining the density distribution data of the radioactive material in the radioactive material container according to the density proportion of the plurality of spatial units of the radioactive material in the radioactive material container and the total density of the radioactive material in the radioactive material container.​

[0011] In an embodiment, the efficiency calibration data of the radioactive material container comprises detection efficiency of at least one region in the radioactive material container; and the step of determining the activity of the radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container comprises: obtaining gamma spectrum data of at least one region in the radioactive material container by detecting gamma rays released by the radioactive material in the radioactive material container, wherein the gamma spectrum data comprises energy values in the gamma spectrum and count rates corresponding to the energy values; and determining the activity of the nuclide of the radioactive material in at least one region in the radioactive material container according to the detection efficiency of at least one region in the radioactive material container, the energy values in the gamma spectrum and the count rates corresponding to the energy values.

[0012] The application further provides a system for obtaining activity of radioactive material, comprising a density distribution module, an efficiency calibration module and an activity obtaining module; the density distribution module is configured to determine density distribution data of radioactive material in a radioactive material container according to muon scanning information of the radioactive material container; the muon scanning information is scanning information obtained by performing scatter imaging scanning on the radioactive material container by using multiple muons; the efficiency calibration module is configured to perform efficiency calibration on the radioactive material container by using passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container, so as to obtain efficiency calibration data of the radioactive material container; and the activity obtaining module is configured to determine the activity of the radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container.

[0013] The application further provides an electronic device, which comprises a memory and a processor, the memory stores a computer program, and the processor implements the above-mentioned activity obtaining method when executing the computer program.

[0014] The application further provides a computer readable storage medium, which stores a computer program, and the computer program implements the above-mentioned activity obtaining method when executed by a processor.

[0015] The application provides a method and product for obtaining activity of radioactive material. The method comprises the following steps: performing scattering imaging scanning on a radioactive material container by using multiple muons, obtaining muon scanning information of the radioactive material container, and determining density distribution data of radioactive material in the radioactive material container according to the muon scanning information. On the one hand, the muon has the characteristics of high energy and strong penetration, and is a natural non-destructive elementary particle probe, which can be used for imaging and non-destructive testing of objects. On the other hand, the scattering imaging scanning can reconstruct the tracks of the muon before and after penetrating the object, has high imaging accuracy, and can accurately determine the density distribution of the radioactive material in the radioactive material container. Further, the radioactive material container is calibrated based on the density distribution data of the radioactive material in the radioactive material container, and the activity of the radioactive material in the radioactive material container is determined, so that the accuracy of the calibration of the radioactive material container and the accuracy of the determination of the activity of the radioactive material can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a flowchart of an embodiment of the method for obtaining activity of radioactive material provided by the application;

[0017] Figure 2 is a scattering point diagram of an embodiment of the method for obtaining activity of radioactive material provided by the application;

[0018] Figure 3 is a specific flowchart of an embodiment of the method for obtaining activity of radioactive material provided by the application;

[0019] Figure 4 is another specific flowchart of an embodiment of the method for obtaining activity of radioactive material provided by the application;

[0020] Figure 5 is a structural diagram of a system for obtaining activity of radioactive material provided by the application;

[0021] Figure 6 is a structural diagram of an embodiment of an electronic device provided by the application;

[0022] Figure 7 is a structural diagram of another embodiment of an electronic device provided by the application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the application.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the objects before and after are in an "or" relationship.

[0025] The activity acquisition method of radioactive material provided by the embodiments of the present application can be applied in a terminal, can be applied in a server end, and can also be software running in a terminal or a server end. In some embodiments, the terminal can be a smart phone, a tablet computer, a notebook computer, a desktop computer, etc.; the server end can be configured as an independent physical server, can be configured as a server cluster or a distributed system composed of multiple physical servers, can also be configured as a cloud server providing basic cloud computing services such as cloud service, cloud database, cloud computing, cloud function, cloud storage, network service, cloud communication, middleware service, domain name service, security service, CDN, and big data and artificial intelligence platform; and the software can be an application for implementing the activity acquisition method of radioactive material, but is not limited to the above forms.

[0026] The activity acquisition method of radioactive material provided by the embodiments of the present application will be described in detail below with reference to the specific embodiments and the accompanying drawings.

[0027] Please refer to Figure 1 The embodiments of the present application provide an activity acquisition method of radioactive material, which comprises:

[0028] Step S101: performing scatter imaging scanning on the radioactive material container by using multiple muons to obtain muon scanning information of the radioactive material container;

[0029] Step S102: determining the density distribution data of the radioactive material in the radioactive material container according to the muon scanning information;

[0030] Step S103: performing efficiency calibration on the radioactive material container by using passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container to obtain efficiency calibration data of the radioactive material container;

[0031] Step S104: determining the activity of the radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container.

[0032] The application provides a kind of activity acquisition method and product of radioactive material, by utilizing multiple muons to carry out scattering imaging scanning to radioactive material container, the muon scanning information of radioactive material container is obtained, and according to muon scanning information, the density distribution data of radioactive material in radioactive material container is determined, one aspect makes full use of the characteristics such as muon energy is high, penetration is strong, is a kind of natural non-destructive elementary particle " probe ", can be imaged and non-destructive testing to object, scattering imaging scanning can reconstruct the track before and after muon penetration object, with higher imaging accuracy and other characteristics, can accurately determine the density distribution of radioactive material in radioactive material container, further based on the density distribution data of radioactive material in radioactive material container, the efficiency calibration of radioactive material container is carried out, and the activity of radioactive material in radioactive material container is determined, can improve the accuracy of radioactive material container efficiency calibration, and the accuracy of determining the activity of radioactive material.

[0033] The muon scanning information in the above step S101 can include, but is not limited to, the first track of each muon in the plurality of muons detected by the first detector into the radioactive material container, the second track of each muon detected by the second detector out of the radioactive material container, or the image of the radioactive material in the radioactive material container.

[0034] Muons are mainly derived from cosmic rays and accelerators. In actual implementation, the first detector and the second detector can be placed on opposite sides of the radioactive material container. The muons first pass through the first detector, then penetrate the radioactive waste container, and then pass through the second detector. The first track of each muon in the plurality of muons into the radioactive material container can be detected by the first detector, and the second track of each muon out of the radioactive material container can be detected by the second detector. In addition, during the penetration of the radioactive material container, part of the muons will collide with the radioactive material in the radioactive material container and scatter, so that there is an angle difference between the first track and the second track of part of the muons. This angle difference can also be referred to as a scattering angle. The scattering angle of each muon can be used to perform scattering imaging on the radioactive material container to determine the image of the radioactive material in the radioactive material container.

[0035] In an embodiment, the step S102 of determining the density distribution data of the radioactive material in the radioactive material container according to the muon scanning information comprises:

[0036] The image of the radioactive material in the radioactive material container is analyzed to determine the density distribution data of the radioactive material in the radioactive material container.

[0037] The embodiment of the present application can improve the accuracy of the radioactive material density distribution data, and further improve the accuracy of the efficiency calibration of the radioactive material container based on the radioactive material density distribution data, and the accuracy of determining the activity of the radioactive material in the radioactive material container based on the efficiency calibration of the radioactive material container.

[0038] Optionally, the intersection of each muon first track and the radioactive material container is the incident point of each muon on the radioactive material container, and the intersection of each muon second track and the radioactive material container is the exit point of each muon on the radioactive material container.

[0039] In another embodiment, the step S102 of determining the density distribution data of the radioactive material in the radioactive material container according to the muon scanning information comprises:

[0040] The midpoint of the common perpendicular line of the first track and the second track of each muon is determined as the scattering point of each muon in the radioactive material container;

[0041] Based on the incident point, the exit point of each muon on the radioactive material container and the scattering point of each muon in the radioactive material container, the track of each muon passing through the radioactive material container is determined;

[0042] The radioactive material container is divided into a plurality of spatial units;

[0043] According to the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units, the target track count value of the plurality of spatial units is determined;

[0044] According to the target track count value of the plurality of spatial units, the volume and the mass of the radioactive material container, the density distribution data of the radioactive material in the radioactive material container is determined.

[0045] Optionally, the track of each muon passing through the radioactive material container includes the incident track and the exit track of each muon, the incident track of each muon is a straight line connecting the incident point of each muon on the radioactive material container and the scattering point of each muon in the radioactive material container, and the exit track of each muon is a straight line connecting the exit point of each muon on the radioactive material container and the scattering point of each muon in the radioactive material container. As shown in the figure, Figure 2 The incident track (straight line L1) of muon μ is obtained by connecting the incident point a of muon μ on the radioactive material container and the scattering point b of muon μ in the radioactive material container, and the exit track (straight line L2) of muon μ is obtained by connecting the exit point c of muon μ on the radioactive material container and the scattering point b of muon μ in the radioactive material container.

[0046] Optionally, the radioactive material container can be divided into multiple spatial units of corresponding shapes based on its three-dimensional shape. For example, if the three-dimensional shape of the radioactive material container is a cube, it can be divided into multiple cubic spatial units; if the three-dimensional shape of the radioactive material container is a sphere, it can be divided into multiple spherical spatial units.

[0047] This application embodiment divides the radioactive material container into multiple spatial units and determines the target track count value of multiple spatial units based on the distance between the tracks of each muon passing through the radioactive material container and the multiple spatial units. This refines the density distribution of radioactive material in the radioactive material container to the spatial unit dimension. Furthermore, based on the target track count value of multiple spatial units, accurate radioactive material density distribution data can be obtained, thereby improving the accuracy of efficiency calibration of the radioactive material container based on the radioactive material density distribution data, and the accuracy of determining the activity of radioactive material in the radioactive material container based on the efficiency calibration of the radioactive material container.

[0048] like Figure 3 As shown, the above method for determining the target track count value of multiple spatial cells based on the distance between the tracks of each muon passing through the radioactive material container and multiple spatial cells includes:

[0049] Step S201: Based on the i-th time length, select the i1-th time period and the i2-th time period from the time period when the first detector detects each muon entering the radioactive material container; wherein, the i1-th time period and the i2-th time period are continuous in time and both have the i-th time length.

[0050] Step S202: Determine the i1th track count value of multiple spatial units based on the distance between the tracks of each muon passing through the radioactive material container and the multiple spatial units during the i1th time period.

[0051] Step S203: Determine the i2th track count value of multiple spatial units based on the distance between the tracks of each muon passing through the radioactive material container and the multiple spatial units during the i2th time period;

[0052] Step S204: Obtain the error between the i1th track count value and the i2th track count value of multiple spatial cells respectively;

[0053] Step S205: Determine whether the errors between the i1th track count value and the i2th track count value of multiple spatial cells all meet the preset range;

[0054] If the errors of the i1th track count value and the i2th track count value of the plurality of spatial units all conform to the preset range, step S206 is performed: the i1th track count value or the i2th track count value of the plurality of spatial units is taken as the target track count value of the plurality of spatial units.

[0055] If any of the errors of the i1th track count value and the i2th track count value of the plurality of spatial units does not conform to the preset range, step S207 is performed: i is updated to i+1, and step S201 is returned to be performed.

[0056] Exemplarily, the i-time length is 5 min, the first detector detects the time period of each muon entering the radioactive material container from 8:00 to 8:30, the selected i1th time period is from 8:00 to 8:05, and the selected i2th time period is from 8:05 to 8:10. The i1th track count value of the plurality of spatial units is determined based on the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units of the radioactive material container in the i1th time period, and the i2th track count value of the plurality of spatial units is determined based on the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units of the radioactive material container in the i2th time period. The error of the i1th track count value and the i2th track count value of each spatial unit in the plurality of spatial units is counted respectively, and the error of the i1th track count value and the i2th track count value of each spatial unit in the plurality of spatial units is obtained.

[0057] If the errors of the i1th track count value and the i2th track count value of each of the plurality of spatial units all conform to the preset range (such as -10%≤error≤10%), it can be considered that the effective muon events for performing scatter imaging scanning on the radioactive material container by using the plurality of muons reach a sufficient amount, and the i1th track count value or the i2th track count value of each of the plurality of spatial units can be taken as the target track count value of each of the spatial units. If any error of the i1th track count value and the i2th track count value of each of the plurality of spatial units does not conform to the preset range (such as the target track count value of any spatial unit < -10%, or the target track count value of any spatial unit > 10%), it can be considered that the effective muon events for performing scatter imaging scanning on the radioactive material container by using the plurality of muons do not reach a sufficient amount, and the next i+1 time length can be selected, such as i+1 time length = 10 min, and based on the i+1 time length, the i+1th time period (such as 8:00-8:05) and the i+2th time period (such as 8:05-8:10) are selected from the time period in which each muon enters the radioactive material container is detected by the first detector, and the above steps are repeated until the effective muon events for performing scatter imaging scanning on the radioactive material container by using the plurality of muons reach a sufficient amount, and the track count value or the track count value of each of the plurality of spatial units at this time is taken as the target track count value of each of the spatial units.

[0058] By comparing each of the plurality of spatial units, the track count value error in any two adjacent and equal time periods in the time period in which each muon enters the radioactive material container is detected by the first detector, the target track count value of each of the plurality of spatial units can be accurately determined, and the accuracy of determining the radioactive material density distribution data in the radioactive material container based on the target track count value of each of the plurality of spatial units can be improved.

[0059] In an embodiment, the step S202 of determining the i1th track count value of the plurality of spatial units according to the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units in the i1th time period, or the step S203 of determining the i2th track count value of the plurality of spatial units according to the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units in the i2th time period, comprises:

[0060] The i1th track count value of the first spatial unit is determined according to the distance between the track of each muon passing through the radioactive material container and the first spatial unit in the i1th time period, and the i2th track count value of the first spatial unit is determined according to the distance between the track of each muon passing through the radioactive material container and the first spatial unit in the i2th time period. n The distance between the track of the first muon to the mth muon passing through the radioactive material container and the first spatial unit is obtained in the i n The total number of muons entering the radioactive material container detected by the first detector in the i

[0061] Based on the relationship between the distance from the 1st to the mth distance and the distance threshold of the first spatial unit, determine the first to the mth track count values ​​of the first spatial unit; wherein, if the rth distance of the first spatial unit is less than the distance threshold of the first spatial unit, the rth track count value of the first spatial unit is 1, 1≤r≤m; if the tth distance of the first spatial unit is greater than or equal to the distance threshold of the first spatial unit, the tth track count value of the first spatial unit is 0, 1≤t≤m;

[0062] Summing the track counts from the first track count to the m-th track count of the first spatial unit determines the i-th track count of the first spatial unit. n Track count values;

[0063] Among them, i n = i1 or i2, where the first spatial unit is any one of the multiple spatial units.

[0064] Optionally, the distance threshold of the spatial unit can be flexibly selected according to the shape of the spatial unit. For example, if the spatial unit is a cube, the side length of the spatial unit can be selected as the distance threshold of the spatial unit. If the spatial unit is a sphere, the radius of the spatial unit can be selected as the distance threshold of the spatial unit.

[0065] For example, suppose the i-th n The total number of muons injected into the radioactive material container within the time period is 10. First, obtain the i-th muon... n The tracks of the 1st to 10th muons passing through the radioactive material container within a time period are compared with the 1st to 10th distances of the first spatial unit. Next, based on the relationship between the 1st to 10th distances and the distance threshold of the first spatial unit, the track count values ​​of the 1st to 10th tracks of the first spatial unit are determined. Specifically, if the 1st to 5th distances are all less than the distance threshold, and the 6th to 10th distances are all greater than the distance threshold, then the track count values ​​of the 1st to 5th tracks of the first spatial unit are all 1, and the track count values ​​of the 6th to 10th tracks are all 0. Finally, the track count values ​​of the 1st to 10th tracks of the first spatial unit are summed to obtain the i-th track count value of the first spatial unit. n Each track count is 5.

[0066] This application embodiment compares the i-th... n By determining the relationship between the distance of each muon's track passing through the radioactive material container and the distance threshold of the first spatial unit within a given time period, multiple track counts for the first spatial unit are determined. Then, by summing these multiple track counts, the i-th track of the first spatial unit can be obtained. n The track count value is sufficient to guarantee the determination of the i-th track value of the first spatial unit.n Based on the accuracy of the track count values, further improve the determination of the i-th track count value of the first spatial unit. n The efficiency of track counts can ensure the accuracy of determining the target track counts in multiple space units and the density distribution data of radioactive materials in radioactive material containers, and improve the efficiency of determining the target track counts in multiple space units and the density distribution data of radioactive materials in radioactive material containers.

[0067] In another embodiment, such as Figure 4 As shown, step S202 above: determining the i1th track count value of multiple spatial units based on the distance between the tracks of each muon passing through the radioactive material container and the multiple spatial units during the i1th time period; or, step S203 above: determining the i2th track count value of multiple spatial units based on the distance between the tracks of each muon passing through the radioactive material container and the multiple spatial units during the i2th time period, including:

[0068] Step S301: Obtain the i-th... n The distance between the track of the m-th muon passing through the radioactive material container within the time period and the second spatial unit, and the m-th distance threshold of the second spatial unit;

[0069] Step S302: Determine the m-th track count value of the second spatial unit according to the m-th relationship; where, if the i-th... n If the distance between the track of the m-th muon passing through the radioactive material container and the second spatial unit within the time period is less than the distance threshold of the second spatial unit, then the current track count value of the second spatial unit is incremented by 1 to obtain the m-th track count value of the second spatial unit; if the i-th muon... n If the distance between the track of the m-th muon passing through the radioactive material container and the second space unit is greater than or equal to the distance threshold of the second space unit, then the current track count value of the second space unit remains unchanged, and the m-th track count value of the second space unit is obtained.

[0070] Step S303: Determine whether the m-th muon is the i-th muon. n The last muon injected into the container of radioactive material within the specified time period;

[0071] If the m-th muon is the i-th n If the last muon injected into the radioactive material container within the time period is determined, then step S304 is executed: the m-th track count value is determined as the i-th track count value of the second space unit. n Track count values;

[0072] If the m-th muon is not the i-th muon nIf the last muon that enters the radioactive material container in the time period is obtained, step S305 is performed: m is updated to m+1, and the execution returns to step S301;

[0073] wherein i n = i1 or i2, the second spatial unit is any spatial unit of the plurality of spatial units, and the initial value of the current track count value of the plurality of spatial units is equal.

[0074] Optionally, the initial value of the current track count value of the plurality of spatial units is 0. For example, it is assumed that the i n The total number of muons that enter the radioactive material container in the time period is 3. First, the i n The first muon that passes through the radioactive material container in the time period has a first relationship with the distance threshold value of the second spatial unit. It is assumed that the i n The first muon that passes through the radioactive material container in the time period has a first relationship with the distance threshold value of the second spatial unit. It is assumed that the i n The last muon that enters the radioactive material container in the time period is obtained, and the i n The second muon that passes through the radioactive material container in the time period has a second relationship with the distance threshold value of the second spatial unit. It is assumed that the i n The second muon that passes through the radioactive material container in the time period has a second relationship with the distance threshold value of the second spatial unit. It is assumed that the i

[0075] The second muon that passes through the radioactive material container in the time period has a second relationship with the distance threshold value of the second spatial unit. It is assumed that the i n The last muon that enters the radioactive material container in the time period is obtained, and the i n The third muon that passes through the radioactive material container in the time period has a third relationship with the distance threshold value of the second spatial unit. It is assumed that the i n The third muon that passes through the radioactive material container in the time period has a third relationship with the distance threshold value of the second spatial unit. It is assumed that the i n The last muon that enters the radioactive material container in the time period is obtained, and the i n The last muon that enters the radioactive material container in the time period is obtained, and the in The track count value is 2.

[0076] The embodiment of the present application updates the current track count value of the second space unit by sequentially comparing the distance between the track of the first muon to the last muon in the time period and the radioactive material container and the second space unit and the distance threshold value of the second space unit, and takes the final update result of the current track count value of the second space unit as the i n th track count value of the second space unit, which can improve the accuracy of determining the i n th track count value of the second space unit, and further improve the accuracy of determining the target track count value of each space unit in the plurality of space units and the accuracy of determining the radioactive material density distribution data in the radioactive material container. n

[0077] Before determining the target track count value of the plurality of space units according to the distance between the track of each muon passing through the radioactive material container and the plurality of space units, the method comprises:

[0078] calculating a first distance from the center point of the target space unit to the incident track of the target muon and a second distance from the center point of the target space unit to the exit track of the target muon, respectively;

[0079] selecting the maximum value of the first distance and the second distance as the distance between the track of the target muon passing through the radioactive material container and the target space unit;

[0080] The target space unit is any space unit in the plurality of space units, and the target muon is any muon in the plurality of muons.

[0081] In an embodiment, the distance between the track of the target muon passing through the radioactive material container and the target space unit can be determined based on the following formula:

[0082] D r = max(min||a(z)-c||,min||b(z)-c||)

[0083] wherein D r represents the distance between the track of the target muon passing through the radioactive material container and the target space unit, min||a(z)-c|| represents the first distance from the center point of the target space unit to the incident track of the target muon, min||b(z)-c|| represents the second distance from the center point of the target space unit to the exit track of the target muon, a(z) represents the incident track of the target muon, b(z) represents the exit track of the target muon, z represents any point on the track of the target muon passing through the radioactive material container, and c represents the center point of the target space unit.

[0084] ​The embodiment can improve the accuracy of determining the target track count value of each space unit based on the relationship between the distance from the track of each muon passing through the radioactive material container to the plurality of space units and the distance threshold, and further improve the accuracy of determining the density distribution data of the radioactive material in the radioactive material container based on the target track count value of each space unit in the plurality of space units.

[0085] The above method for determining the density distribution data of the radioactive material in the radioactive material container based on the target track count value of the plurality of space units, the volume and mass of the radioactive material container comprises:

[0086] Determining the overall density of the radioactive material in the radioactive material container based on the volume and mass of the radioactive material container;

[0087] Determining the density proportion of the radioactive material in the plurality of space units in the radioactive material container based on the target track count value of the plurality of space units;

[0088] Determining the density distribution data of the radioactive material in the radioactive material container based on the density proportion of the radioactive material in the plurality of space units in the radioactive material container and the overall density of the radioactive material in the radioactive material container.

[0089] Taking the radioactive material container as a radioactive material barrel as an example, the overall density of the radioactive material in the radioactive material container can be calculated by the following formula:

[0090] The overall density of the radioactive material in the radioactive material container = (the weight of the radioactive material barrel containing the radioactive material - the empty barrel weight of the radioactive material barrel) / the volume of the radioactive material barrel;

[0091] Further, the density proportion of the radioactive material in the i-th space unit in the radioactive material container can be calculated by the following formula:

[0092] The density proportion of the radioactive material in the i-th space unit = the target track count value of the i-th space unit / the sum of the target track count values of the plurality of space units;

[0093] Further, the density value of the radioactive material in the i-th space unit can be calculated by the following formula:

[0094] The density distribution value of the radioactive material in the i-th space unit = the density proportion of the radioactive material in the i-th space unit x the overall density of the radioactive material in the radioactive material container;

[0095] The embodiment of the present application determines the density proportion of radioactive material in multiple spatial units based on the target track counting values of the multiple spatial units, can obtain accurate radioactive material density distribution data, and further can improve the accuracy of efficiency calibration of the radioactive material container based on the radioactive material density distribution data and the accuracy of determining the activity of the radioactive material in the radioactive material container based on the efficiency calibration of the radioactive material container.

[0096] The step S103 is to calibrate the efficiency of the radioactive material container by the passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container, to obtain the efficiency calibration data of the radioactive material container, including:

[0097] The three-dimensional model of the radioactive material container, the material information of the radioactive material in the radioactive material container, the energy spectrum type used for calibrating the efficiency of the radioactive material container, and the activity of the radioactive source are obtained.

[0098] The density distribution data of the radioactive material in the radioactive material container, the three-dimensional model of the radioactive material container, the material information of the radioactive material in the radioactive material container, and the energy spectrum type used for calibrating the efficiency of the radioactive material container and the activity of the radioactive source are configured into the passive efficiency calibration software.

[0099] The efficiency of the radioactive material container is calibrated by the passive efficiency calibration software to obtain the efficiency calibration data of the radioactive material container.

[0100] Optionally, the material information of the radioactive material includes information that the radioactive material is a fiber material or the radioactive material is a resin material, the energy spectrum type used for calibrating the efficiency of the radioactive material container is a gamma (γ) ray energy spectrum (i.e. adding energy points), the radioactive source used for calibrating the efficiency of the radioactive material container is a gamma (γ) ray radioactive source, and the activity of the radioactive source is the number of particles released per second by the radioactive source.

[0101] Optionally, the density distribution data of the radioactive material in the radioactive material container, the three-dimensional model of the radioactive material container, the material information of the radioactive material in the radioactive material container, and the energy spectrum type used for calibrating the efficiency of the radioactive material container and the activity of the radioactive source are configured into the passive efficiency calibration software. The passive efficiency calibration software calibrates the efficiency of the radioactive material container, and finally outputs the efficiency calibration data of the radioactive material container in the form of an efficiency calibration fitting curve. It is worth mentioning that if the efficiency of the radioactive material container is calibrated in regions, the efficiency calibration data of the radioactive material container includes the detection efficiency of at least one region in the radioactive material container.

[0102] The muon scanning information is obtained by performing scattering imaging scanning on the radioactive material container by using a plurality of muons, and the radioactive material density distribution data is determined based on the muon scanning information. The radioactive material container is calibrated by the passive efficiency calibration software, so that the efficiency and accuracy of the radioactive material container calibration can be improved, and the efficiency and accuracy of determining the activity of the radioactive material in the radioactive material container based on the efficiency calibration of the radioactive material container can be improved.

[0103] The step S104 comprises:

[0104] The gamma energy spectrum data of at least one region in the radioactive material container is obtained by detecting the gamma rays released by the radioactive material in the radioactive material container, and the gamma energy spectrum data comprises energy values in the gamma energy spectrum and count rates corresponding to the energy values.

[0105] The activity of the nuclide of the radioactive material in the at least one region in the radioactive material container is determined according to the detection efficiency of the at least one region in the radioactive material container, the energy values in the gamma energy spectrum and the count rates corresponding to the energy values.

[0106] Optionally, the gamma rays released by the radioactive material in the at least one region in the radioactive material container for efficiency calibration can be detected by any one of the scanning modes of the segmented scanning, the tomographic scanning and the double-detector spiral scanning, so as to obtain the gamma energy spectrum data of the at least one region in the radioactive material container. According to the energy values in the gamma energy spectrum of the at least one region in the radioactive material container, the nuclide of the radioactive material in the at least one region in the radioactive material container can be determined, and according to the detection efficiency of the at least one region in the radioactive material container, the energy values in the gamma energy spectrum and the count rates corresponding to the energy values, the activity of the nuclide of the radioactive material in the at least one region in the radioactive material container can be determined.

[0107] The embodiment of the present application firstly determines the density distribution data of the radioactive material in the radioactive material container based on muon scanning information obtained by performing scattering imaging scanning on the radioactive material container by using multiple muons, then performs efficiency calibration on the radioactive material container by using passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container, obtains efficiency calibration data of at least one region in the radioactive material container, and finally determines the nuclide and activity of the radioactive material in at least one region in the radioactive material container based on the efficiency calibration data of at least one region in the radioactive material container and gamma spectrum data, which can not only improve the accuracy of efficiency calibration of the radioactive material container, but also improve the accuracy of determination of the activity of the radioactive material, especially in the case that the density distribution of the radioactive material in the radioactive material container is uneven, the accuracy of efficiency calibration of the radioactive material container and the accuracy of determination of the activity of the radioactive material can be significantly improved.

[0108] Please refer to Figure 5 The embodiment of the present application also provides an activity acquisition system 400 of radioactive material, which can realize the activity acquisition method of radioactive material, and the system comprises a scanning module 401, a density distribution module 402, an efficiency calibration module 403 and an activity acquisition module 404.

[0109] The scanning module 401 is configured to perform scattering imaging scanning on the radioactive material container by using multiple muons to obtain muon scanning information of the radioactive material container.

[0110] The density distribution module 402 is configured to determine the density distribution data of the radioactive material in the radioactive material container according to the muon scanning information.

[0111] The efficiency calibration module 403 is configured to perform efficiency calibration on the radioactive material container by using passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container to obtain efficiency calibration data of the radioactive material container.

[0112] The activity acquisition module 404 is configured to determine the activity of the radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container.

[0113] The activity acquisition system of radioactive material provided by the embodiment of the present application can realize each step of the activity acquisition method of radioactive material, and can achieve the same technical effect. To avoid repetition, details are not described here.

[0114] Optionally, as Figure 6As shown, the embodiment of the present application further provides an electronic device 500, comprising a processor 501 and a memory 502, wherein the memory 502 stores a program or instruction which can be run on the processor 501, and the program or instruction is executed by the processor 501 to realize each step of the above-mentioned activity acquisition method of radioactive material and achieve the same technical effects. For the sake of avoiding repetition, details are not described herein. It should be noted that the electronic device in the embodiment of the present application includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0115] Figure 7 To realize the hardware structure of the electronic device in the embodiment of the present application, the electronic device comprises:

[0116] The processor 601 can be implemented in the form of a general-purpose CPU (Central Processing Unit), a microprocessor, an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits, etc., and is used to execute related programs to realize the technical solutions provided by the embodiment of the present application.

[0117] The memory 602 can be implemented in the form of a ROM (ReadOnly Memory), a static storage device, a dynamic storage device, or a RAM (Random Access Memory), etc. The memory 602 can store an operating system and other application programs, and when the technical solutions provided by the embodiment of the present application are implemented by software or firmware, the related program codes are saved in the memory 602 and are called and executed by the processor 601 to realize the activity acquisition method of radioactive material in the embodiment of the present application.

[0118] The input / output interface 603 is used to realize information input and output.

[0119] The communication interface 604 is used to realize the communication interaction between the device and other devices, and can realize communication through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0120] The bus 605 is used to transmit information between various components (such as the processor 601, the memory 602, the input / output interface 603, and the communication interface 604) of the device.

[0121] The processor 601, the memory 602, the input / output interface 603, and the communication interface 604 are connected to each other through the bus 605 to realize the communication connection between them inside the device.

[0122] The electronic device provided by the embodiments of the present application can implement each step of the activity acquisition method of radioactive material and achieve the same technical effects. To avoid repetition, details are not described herein.

[0123] The embodiments of the present application also provide a computer readable storage medium, and the computer readable storage medium stores programs or instructions. When the programs or instructions are executed by a processor, each step of the activity acquisition method of radioactive material is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein.

[0124] The processor is the processor in the electronic device described in the above embodiments. The computer readable storage medium includes computer readable storage media, such as computer readable only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0125] The embodiments of the present application further provide a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to execute programs or instructions to implement each step of the activity acquisition method of radioactive material and achieve the same technical effects. To avoid repetition, details are not described herein.

[0126] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0127] The embodiments of the present application provide a computer program product. The program product is stored in a storage medium. The program product is executed by at least one processor to implement each step of the activity acquisition method of radioactive material and achieve the same technical effects. To avoid repetition, details are not described herein.

[0128] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or further include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to the order of performing the functions shown or discussed, but can also include performing the functions in a substantially simultaneous manner or in a reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted or combined. In addition, the features described with reference to some examples can be combined in other examples.

[0129] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned example methods can be realized by means of software and a necessary general hardware platform, and of course, can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a computer software product in essence or in the form of a part that contributes to the prior art, which is stored in a storage medium (such as a ROM / RAM, a magnetic disc, an optical disc), and includes a plurality of instructions for causing a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application.

[0130] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms without departing from the scope of the present application under the inspiration of the present application, and all of them belong to the protection of the present application.

Claims

1. A method of obtaining the activity of a radioactive material, characterized in that, The method comprises the following steps: muon scattering imaging scanning is performed on a radioactive material container by using a plurality of muons to obtain muon scanning information of the radioactive material container; the muon scanning information comprises a first track of each muon in the plurality of muons detected by a first detector and a second track of each muon detected by a second detector, wherein the first track is a track of each muon entering the radioactive material container, and the second track is a track of each muon exiting the radioactive material container; the first detector and the second detector are respectively located on opposite sides of the radioactive material container; the intersection of the first track of each muon and the radioactive material container is an incident point of each muon on the radioactive material container, and the intersection of the second track of each muon and the radioactive material container is an exit point of each muon on the radioactive material container; a midpoint of a common perpendicular line of the first track and the second track of each muon is determined as a scattering point of each muon in the radioactive material container; based on the incident point, the exit point and the scattering point of each muon on the radioactive material container, a track of each muon passing through the radioactive material container is determined; the radioactive material container is divided into a plurality of spatial units; target track count values of the plurality of spatial units are determined according to distances between the track of each muon passing through the radioactive material container and the plurality of spatial units; density distribution data of radioactive material in the radioactive material container is determined according to the target track count values of the plurality of spatial units, a volume and a mass of the radioactive material container; based on the density distribution data of radioactive material in the radioactive material container, efficiency calibration of the radioactive material container is performed by using passive efficiency calibration software to obtain efficiency calibration data of the radioactive material container; activity of the radioactive material in the radioactive material container is determined according to the efficiency calibration data of the radioactive material container.

2. The activity acquisition method according to claim 1, wherein The step of determining the target track count values of the plurality of spatial units according to the distances between the track of each muon passing through the radioactive material container and the plurality of spatial units comprises the following steps: based on an ith time length, an ith1 time period and an ith2 time period are selected from a time period in which each muon enters the radioactive material container is detected by the first detector; wherein the ith1 time period and the ith2 time period are time-continuous and have the same length of the ith time length; an ith1 track count value of the plurality of spatial units is determined according to distances between the track of each muon passing through the radioactive material container and the plurality of spatial units in the ith1 time period; an ith2 track count value of the plurality of spatial units is determined according to distances between the track of each muon passing through the radioactive material container and the plurality of spatial units in the ith2 time period; errors of the ith1 track count value and the ith2 track count value of the plurality of spatial units are respectively obtained. if errors of the i1th track count value and the i2th track count value of the plurality of spatial units all conform to the preset range, taking the i1th track count value or the i2th track count value of the plurality of spatial units as a target track count value of the plurality of spatial units; if any of the errors of the i1th track count value and the i2th track count value of the plurality of spatial units does not conform to the preset range, updating i to i+1, and returning to execute the step of selecting an i1th time period and an i2th time period from the time period in which each muon detected by the first detector enters the radioactive material container within an i-time length.

3. The activity acquisition method according to Claim 2, characterized by The step of determining the i1th track count value of the plurality of spatial units according to the distance between the track of each muon passing through the radioactive material container within the i1th time period and the plurality of spatial units, or the step of determining the i2th track count value of the plurality of spatial units according to the distance between the track of each muon passing through the radioactive material container within the i2th time period and the plurality of spatial units, comprises: respectively, the first distance to the mth distance of the first spatial unit, wherein m is the number of muons detected by the first detector in the ith time period. n the first distance to the mth distance of the first spatial unit, wherein m is the number of muons detected by the first detector in the ith time period. n the total number of muons entering the radioactive material container in the ith time period; determining the first track count value to the mth track count value of the first spatial unit according to the relationship between the first distance to the mth distance and the distance threshold value of the first spatial unit, respectively; wherein if the rth distance of the first spatial unit is less than the distance threshold value of the first spatial unit, the rth track count value of the first spatial unit is 1, 1≤r≤m; if the tth distance of the first spatial unit is greater than or equal to the distance threshold value of the first spatial unit, the tth track count value of the first spatial unit is 0, 1≤t≤m; summing the first track count value to the mth track count value of the first spatial unit to determine an ith track count value of the first spatial unit; n the first track count value to the mth track count value of the first spatial unit to determine an ith track count value of the first spatial unit; wherein i n = i1or i2, the first spatial unit being any of the plurality of spatial units.

4. The activity acquisition method of claim 1, wherein The track of each muon passing through the radioactive material container comprises an incident track of each muon and an exit track of each muon; wherein the incident track of each muon is a straight line connecting the incident point of each muon on the radioactive material container and the scattering point of each muon in the radioactive material container, and the exit track of each muon is a straight line connecting the exit point of each muon on the radioactive material container and the scattering point of each muon in the radioactive material container; Before the step of determining the target track count value of the plurality of spatial units according to the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units, comprising: respectively calculating a first distance from the center point of a target spatial unit to the incident track of a target muon, and a second distance from the center point of the target spatial unit to the exit track of the target muon; selecting the maximum value between the first distance and the second distance as the distance between the track of the target muon passing through the radioactive material container and the target spatial unit; wherein the target spatial unit is any spatial unit in the plurality of spatial units, and the target muon is any muon in the plurality of muons.

5. The activity acquisition method of claim 1, wherein The step of determining the density distribution data of the radioactive material in the radioactive material container according to the target track count value of the plurality of spatial units, the volume and the mass of the radioactive material container, comprises: determine a total density of radioactive material in the radioactive material container according to the volume and the mass of the radioactive material container; determine a density proportion of radioactive material in the radioactive material container in the plurality of spatial units according to the target track count values of the plurality of spatial units; determine density distribution data of radioactive material in the radioactive material container according to the density proportion of radioactive material in the radioactive material container in the plurality of spatial units and the total density of radioactive material in the radioactive material container.

6. The activity acquisition method of claim 1, wherein The efficiency calibration data of the radioactive material container includes a detection efficiency of at least one region in the radioactive material container; The step of determining the activity of radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container includes: obtaining gamma spectrum data of at least one region in the radioactive material container by detecting gamma rays released by radioactive material in the radioactive material container, the gamma spectrum data including energy values in a gamma spectrum and count rates corresponding to the energy values; determining the activity of a nuclide of radioactive material in at least one region in the radioactive material container according to the detection efficiency of at least one region in the radioactive material container, the energy values in the gamma spectrum and the count rates corresponding to the energy values.

7. An activity acquisition system for radioactive material, characterized by, The method includes a scanning module, a density distribution module, an efficiency calibration module and an activity acquisition module; The scanning module is used to perform scatter imaging scanning on a radioactive material container by using a plurality of muons to obtain muon scanning information of the radioactive material container; the muon scanning information includes a first track of each muon in the plurality of muons detected by a first detector and a second track of each muon detected by a second detector; the first detector and the second detector are respectively located on opposite sides of the radioactive material container; the intersection of the first track of each muon into the radioactive material container and the radioactive material container is an incident point of each muon on the radioactive material container, and the intersection of the second track of each muon out of the radioactive material container and the radioactive material container is an exit point of each muon on the radioactive material container; The density distribution module is used to determine a scattering point of each muon in the radioactive material container as a midpoint of a common perpendicular line of the first track and the second track of each muon, determine a track of each muon passing through the radioactive material container based on the incident point, the exit point and the scattering point of each muon on the radioactive material container, divide the radioactive material container into a plurality of spatial units, and determine target track count values of the plurality of spatial units according to the distance between the track of each muon passing through the radioactive material container and the plurality of spatial units, and determine density distribution data of radioactive material in the radioactive material container according to the target track count values of the plurality of spatial units, the volume and the mass of the radioactive material container. The efficiency calibration module is configured to calibrate the radioactive material container by using passive efficiency calibration software based on the density distribution data of the radioactive material in the radioactive material container, to obtain efficiency calibration data of the radioactive material container. The activity acquisition module is configured to determine the activity of the radioactive material in the radioactive material container according to the efficiency calibration data of the radioactive material container.

8. An electronic device, comprising: The electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the activity acquisition method in any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by the processor to implement the activity acquisition method in any one of claims 1 to 6.

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