Radionuclide identification system and method

Abstract

The invention discloses a radionuclide identification system and method, and the system comprises a sample placement module which is used for placing a radionuclide sample; the absorption sheet module is positioned above the sample placement module, is provided with a plurality of absorption sheets with different models, and is used for weakening absorption of rays emitted by nuclides; the acquisition module is positioned above the absorption sheet placing module and is used for acquiring information of rays passing through the absorption sheet; the processing module comprises a control unit and an analysis unit, the control unit is used for controlling the absorption piece module to switch the absorption pieces, and the analysis unit is connected with the acquisition module and used for analyzing the ray information; according to the invention, the limitation of traditional equipment in the aspect of switching the absorption sheets is overcome, the absorption sheets are automatically switched by adopting an automatic control mode, and the experiment efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to nuclide identification, in particular to a radioactive nuclide identification system and method. Background Art

[0002] As an important means of identifying radionuclides, the mass absorption coefficient method has a wide range of applications in nuclear science and related fields. This method measures the absorption of radionuclides in different absorption films and then determines their mass absorption coefficients, thereby achieving identification and analysis of radionuclides.

[0003] However, in the process of implementing the mass absorption coefficient method, the traditional mass absorption coefficient method equipment is relatively simple in design, has a relatively single function, and often does not have the ability to operate multiple processes simultaneously. This limitation has greatly restricted the improvement of experimental efficiency.

[0004] Especially in the switching of absorbent sheets, the traditional method mainly relies on manual operation. Manual switching of absorbent sheets not only requires the experimenter to have high operating skills, but also the whole switching process is cumbersome and time-consuming. More importantly, in the process of manually switching absorbent sheets, the entire experiment process usually needs to be stopped, which further prolongs the experiment time.

[0005] For a complete experiment, at least 6+1 absorbers are usually required (6 for experimental measurement and 1 for background). If manual switching is used, the experimenter needs to interrupt the experiment several times to replace different absorbers. This not only increases the complexity of the experimental operation, but also greatly reduces the experimental efficiency. Summary of the invention

[0006] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a system and method for identifying radioactive nuclides. The identification system overcomes the limitations of traditional equipment in switching absorbers, and automatically switches absorbers in an automatic control manner, thereby improving experimental efficiency.

[0007] In one aspect, the present invention provides a radionuclide identification system, comprising: A sample placement module, used for placing radionuclide samples; An absorption sheet module, located above the sample placement module, has a plurality of absorption sheets of different types, and is used for attenuating the absorption of the radiation emitted by the nuclide; A collection module, located above the absorption sheet placement module, for collecting information of radiation after passing through the absorption sheet; and The processing module includes a control unit and an analysis unit. The control unit is used to control the absorption sheet module to switch the absorption sheet. The analysis unit is connected to the acquisition module and is used to analyze the ray information.

[0008] Optionally, the absorption sheet module includes a feeding tray, a driving member and a plurality of absorption sheets of different models; The feed tray is provided with a plurality of evenly spaced absorption sheet placement areas, the absorption sheet placement areas have through holes (the absorption sheet placement areas are grooves provided in the feed tray, the grooves have through holes, and the through holes can realize that the absorption sheet is directly opposite to a certain area of ​​the nuclide sample, and there is no obstruction in between), the absorption sheets are placed in the absorption sheet placement areas, and the number of the absorption sheet placement areas is not less than the number of the absorption sheets; The driving member is drivingly connected to the feeding tray, and drives the feeding tray to regularly transport the absorption sheet to the top of the nuclide sample.

[0009] Optionally, the driving member drives the feeding tray to rotate about a first axis, and a plurality of the absorbent sheet placement areas are evenly arranged in a circular array with the first axis as the center.

[0010] Optionally, the sample placement module includes a feeding block, a discharging block and a cover plate; The material discharging block has a receiving groove for placing the nuclide sample, the cover plate covers the receiving groove, at least the surface of the material discharging block and the cover plate contacting the nuclide sample has a radiation shielding layer (the material discharging block and the cover plate can be made of radiation shielding material, so that the radiation shielding layer is formed on the surface of the material discharging block and the cover plate contacting the nuclide sample), and a guide hole penetrating the radiation shielding layer is opened on the cover plate; The discharge block is installed on the feeding block (the discharge block is provided with a handle, and the user pushes the feeding block through the handle), and the feeding block drives the discharge block to move in a directional manner under the action of an external force; After the discharge block is located directly below the absorption sheet, the guide hole is located directly below the absorption sheet (the guide hole can enable the nuclide sample after the cover plate is covered to be directly opposite to a certain area of ​​the absorption sheet, and there is no obstruction in the middle, thereby realizing directional radiation of the nuclide sample).

[0011] Optionally, the feed block is adapted with a directional track and a limit point.

[0012] Optionally, the acquisition module includes a probe and a probe fixing frame, the probe fixing frame is fixedly installed directly above the absorption sheet module, and the probe is detachably installed on the probe fixing frame.

[0013] In another aspect, the present invention provides a method for identifying a radionuclide, which is implemented by the radionuclide identification system, and the method comprises the following steps: The nuclide sample is pushed to the position directly below the probe of the acquisition module by placing the module; The control unit controls the absorber module to move absorbers of different types between the probe and the nuclide sample in order, so that the probe, the designated absorber and the nuclide sample are on the same axis; The analysis unit obtains the radiation information collected by the probe under different absorption sheets, and identifies the nuclides according to the radiation information.

[0014] Optionally, the method of moving the absorber sheet between the probe and the radionuclide sample in a regular sequence is: The driving member drives the feeding tray to rotate regularly according to the angle according to the control signal of the control unit; The feeding tray stops rotating after rotating to a designated position, and the designated absorption sheet is directly opposite to the probe; After an absorbent sheet stops for a set time or the driving member receives the next control signal, the driving member drives the feeding plate to continue rotating to another angle and rotates the next absorbent sheet to a specified position.

[0015] Optionally, the probe is a scintillator probe or a plastic scintillator probe, and the radiation information is the counts obtained by the nuclide sample using the scintillator probe under the action of a designated absorption sheet.

[0016] Optional methods for identifying nuclides based on radiographic information are: The attenuation degree of the nuclide sample is determined by the counts obtained by the scintillator probe under different absorption films, and the nuclide is then identified based on the attenuation degree.

[0017] The present invention has the following advantages: The radioactive nuclide identification system and method of the present invention are suitable for the identification of radioactive nuclides, especially the identification of β nuclides. The identification system can integrate the sample placement module, the absorption sheet module and the collection module into one, which is controlled by the processing module, thereby improving the integration of the device; the absorption sheet module can realize automatic switching of the absorption sheet and improve the experimental efficiency.

[0018] At the same time, a processing module is reasonably designed to realize automatic control and analysis. The processing module includes a control unit and an analysis unit, wherein the control unit can control the absorption sheet module, and the analysis unit can analyze and process the radiation information obtained by the acquisition module to complete the identification of radioactive nuclides.

[0019] The radioactive nuclide identification method is based on an identification system and uses a mass absorption coefficient method to achieve identification. The counts obtained by the scintillator probe under different absorption sheets are used to determine the attenuation degree of the nuclide sample, and then the nuclide is identified based on the attenuation degree, thereby improving the efficiency of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of the radionuclide identification system of the present invention (the sample placement module is in a loading state); Figure 2 It is a schematic diagram of the structure of the radionuclide identification system of the present invention (the sample placement module is in place); Figure 3 It is a schematic diagram of the structure of the radionuclide identification system after separation and processing modules of the present invention (the sample placement module is in the loading state); Figure 4 It is a schematic diagram of the structure of the radionuclide identification system after separation and processing modules of the present invention (the sample placement module is in place); Figure 5 yes Figure 4 A schematic diagram of the main view of the state identification system; Figure 6 yes Figure 4 A top view schematic diagram of a state identification system; Figure 7 yes Figure 4 Schematic cross-sectional view of AA in the figure; Figure 8 is a schematic diagram of the sample placement module of the present invention being located directly below the absorption sheet module; Fig. 9 is a schematic diagram of the structure of the sample placement module of the present invention; Fig.10 is a partial split schematic diagram of the sample placement module of the present invention; Fig.11 is a schematic structural diagram of the absorbent sheet module of the present invention; Fig.12 is a schematic structural diagram of the absorbent sheet module of the present invention from another viewing angle; Fig.13 is a structural schematic diagram of the processing module of the present invention; In the figure: 100, sample placement module; 101, feeding block; 102, directional track; 103, limit point; 104, placement groove; 105, discharge block; 106, cover plate; 107, receiving groove; 108, handle; 109, guide hole; 200, absorption sheet module; 201, feeding tray; 202, driving member; 203, absorption sheet placement area; 204, through hole; 300, acquisition module; 301, probe; 302, probe fixing frame; 303, probe groove; 304, probe through hole; 400, processing module; 401, analysis unit; 402, control unit; 500, working base surface; 600, absorption sheet; 700, nuclide sample. DETAILED DESCRIPTION

[0021] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0022] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0023] As described in the background technology, the traditional method of switching the absorbent sheet mainly relies on manual operation. Manual switching of the absorbent sheet not only requires the experimenter to have high operating skills, but also the entire switching process is cumbersome and time-consuming. More importantly, in the process of manually switching the absorbent sheet, the entire experimental process usually needs to be stopped, which further prolongs the experimental time.

[0024] For a complete experiment, at least 6+1 absorbers are usually required (6 for experimental measurement and 1 for background). If manual switching is used, the experimenter needs to interrupt the experiment several times to replace different absorbers. This not only increases the complexity of the experimental operation, but also greatly reduces the experimental efficiency.

[0025] Based on the above reasons, this embodiment provides a radionuclide identification system, such as Figure 1-Figure 2 As shown, the identification system includes: The sample placement module 100 is used to place radionuclide samples; The absorption sheet module 200 is located above the sample placement module and has a plurality of absorption sheets of different types for attenuating the absorption of the radiation emitted by the nuclide; A collection module 300, located above the absorption sheet placement module, for collecting information of radiation after passing through the absorption sheet; and The processing module 400 includes a control unit 402 and an analysis unit 401. The control unit is used to control the absorption sheet module to switch the absorption sheet. The analysis unit is connected to the acquisition module and is used to analyze the ray information.

[0026] The above technical features are suitable for the identification of radionuclides, especially βIdentification of nuclides, the identification system can integrate the sample placement module, the absorption sheet module and the acquisition module into one, which is controlled by the processing module, thereby improving the integration of the device; the absorption sheet module can realize automatic switching of the absorption sheet by designing the absorption sheet module, thereby improving the experimental efficiency. When the above technical features are used, the nuclide sample is first placed in the sample placement module and pushed to the specified position, and then the specified absorption sheet is switched to the top of the nuclide sample, and then the radiation information is obtained through the acquisition module, and the processing module analyzes and identifies the nuclides according to the radiation information. During this use, the control unit controls the absorption sheet module to automatically switch different absorption sheets, so as to better analyze the attenuation degree of the nuclide sample under different absorption sheets. Optionally, the processing module 100 can be a PC, wherein the processing unit 401 and the control unit 402 can be a program in the PC.

[0027] In order to realize the switching of a plurality of different types of absorbent sheets, in one embodiment, Figure 3-Figure 8 and Figure 11-Figure 12 As shown, the absorption sheet module 200 is installed on a working base surface 500, and the absorption sheet module includes a feeding tray 201, a driving member 202 and several absorption sheets 600 of different models; The feed tray 201 is provided with a number of absorption sheet placement areas 203 which are evenly arranged at equal intervals, and the absorption sheet placement area 203 has a through hole 204. Optionally, the absorption sheet placement area is a groove opened in the feed tray, and the groove has a through hole, which can enable the absorption sheet to be directly opposite to a certain area of ​​the radionuclide sample without any obstruction in between; the absorption sheets are placed in the absorption sheet placement area, and the number of the absorption sheet placement areas is not less than the number of the absorption sheets. Preferably, the number of the absorption sheets and the number of the absorption sheet placement areas are both 10.

[0028] The driving member is drivingly connected to the feeding tray, and drives the feeding tray to regularly transport the absorption sheet to the top of the nuclide sample.

[0029] Preferably, the driving member 202 is a servo motor fixed to the working base surface 500, the feed tray 201 is circular, and the driving member drives the feed tray to rotate about a first axis. Several absorption sheet placement areas are evenly arranged in a circular array with the first axis as the center, and the first axis vertically runs through the center of the feed tray. The first axis is the central axis after the radionuclide sample in the sample placement module, the designated absorption sheet on the feed tray, and the probe of the collection module are facing each other when the identification system is in use.

[0030] The above-mentioned technical features can realize automatic switching of the absorbent sheets. The rotation of the servo motor drives the feed tray to rotate. When the feed tray rotates to different angles, different absorbent sheets can be transported to the specified position (i.e., directly below the collection module). By designing multiple absorbent sheet placement areas on the feed tray, multiple absorbent sheets can be placed. When switching the absorbent sheets, only the rotation of the servo motor needs to be controlled. The whole process can be completed in less than one second, thus overcoming the low efficiency of traditional manual switching of absorbent sheets.

[0031] In order to accurately deliver the nuclide sample to the specified location, in one embodiment, Figure 3 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, the sample placement module 100 includes an oriented track 102, a feeding block 101, a discharging block 105 and a cover plate 106. The oriented track 102 is fixedly mounted on the working base surface 500, and the feeding block 101 is slidably mounted on the oriented track 102. A limited position 103 is fixedly set on the oriented track or the working base surface. The material discharging block 105 has a receiving groove 107 for placing and positioning the nuclide sample 700. The cover plate 106 is installed on the material discharging block and covers the receiving groove. A cover plate receiving groove is provided on the upper edge of the receiving groove to facilitate the placement of the cover plate. The cover plate receiving groove can also prevent the cover plate from slipping by designing the cover plate receiving groove. At least the surfaces of the discharge block 105 and the cover plate 106 in contact with the nuclide sample are provided with a radiation shielding layer; optionally, the discharge block and the cover plate can be made of a radiation shielding material, so that a radiation shielding layer is formed on the surfaces of the discharge block and the cover plate in contact with the nuclide sample, and a guide hole 109 penetrating the radiation shielding layer is opened on the cover plate; The discharge block 105 is installed on the feed block 101. The feed block 101 has a placement groove 104 for placing the discharge block. The placement groove can position the discharge block. The design of the groove can prevent the discharge block from slipping. The discharge block is provided with a handle 108. The user pushes the feed block through the handle. The staff pushes the feed block to slide on the directional track until it reaches the limit point. After reaching the limit point, the discharge block with the nuclide sample is just below the designated absorption sheet. After the discharge block is located directly below the absorption sheet, the guide hole is located directly below the absorption sheet; the guide hole can realize that the nuclide sample after the cover plate is covered is directly opposite to a certain area of ​​the absorption sheet, and there is no obstruction in the middle, so as to realize the directional radiation of the nuclide sample (that is, radiation in the direction of the absorption sheet).

[0032] The above technical features can realize the fixed-point placement of radionuclide samples, so that the radionuclide samples, absorption sheets and collection modules are on the same axis; through the adaptation of the shielding layer and the guide hole, directional radiation of the radionuclide can be realized, reducing the impact of radiation leakage on the environment or staff. When the above technical features are in use, the staff first places the radionuclide sample in the receiving slot of the discharge block, then covers the cover plate, and then places the discharge block with the radionuclide sample on the feed block, and then pushes the feed block to slide on the directional track until it reaches the limit point by the handle. In the above technical features, an independent discharge block is installed on the feed block for the purpose of facilitating the staff to replace the discharge block, because different radionuclide samples may use different discharge blocks. This design can facilitate the staff to replace the discharge block as a whole, avoiding replacement of the entire feed block.

[0033] In order to realize the collection of ray information, such as Figure 2-Figure 4 , Figure 7 and Fig.13 As shown, in one embodiment, the acquisition module includes a probe 301 and a probe fixing frame 302. The probe fixing frame 302 is fixedly installed directly above the absorption sheet module, and the probe 301 is detachably installed on the probe fixing frame. The probe fixing frame 302 is fixedly installed on the working base surface 500, and a probe placement area is provided on the probe fixing frame. The probe placement area may be a probe groove 303, and the probe groove has a probe through-hole 304. The probe is placed in the probe groove, and the probe is directly opposite to the absorption sheet through the probe through-hole 304 of the probe groove; the probe is connected to the PC for communication via a data cable. The above-mentioned probe fixing frame facilitates the staff to switch the probe. Preferably, the nuclide sample is 90 Y, this nuclide can radiate beta rays, so the probe can adopt a plastic scintillator probe, and at the same time, the voltage stabilizer and multi-channel analyzer module can be integrated inside the probe to simplify the volume of the probe. When in use, it is connected to the PC via a data cable.

[0034] In the above embodiment, the working base surface 500 is a horizontal working surface, or a working surface formed on the upper surface of a PC host or other experimental equipment. This technical feature can realize the integration of the sample placement module 100, the absorption sheet module 200 and the collection module 300, so that the staff can complete the experiment quickly and efficiently in the same area.

[0035] In another embodiment, a method for identifying a radionuclide is provided. The method is implemented by the radionuclide identification system, and the method comprises the following steps: Step S100, pushing the nuclide sample to the position directly below the probe of the collection module through the placement module; Step S200, controlling the absorption sheet module through the control unit to move absorption sheets of different types in order between the probe and the nuclide sample in order to make the probe, the designated absorption sheet and the nuclide sample on the same axis; Step S300: The analysis unit obtains the radiation information collected by the probe under different absorption sheets, and identifies the nuclides according to the radiation information.

[0036] Furthermore, in step S200, the method for moving the absorption sheet between the probe and the nuclide sample in sequence according to a regular pattern is: The driving member drives the feeding tray to rotate regularly according to the angle according to the control signal of the control unit; The feeding tray stops rotating after rotating to a designated position, and the designated absorption sheet is directly opposite to the probe; After an absorbent sheet stops for a set time or the driving member receives the next control signal, the driving member drives the feeding plate to continue rotating to another angle and rotates the next absorbent sheet to a specified position.

[0037] Furthermore, the probe is a scintillator probe, and the radiation information is the counts obtained by the nuclide sample using the scintillator probe under the action of a designated absorption sheet.

[0038] Further, the nuclide sample is 90 Y, the absorption sheet is an aluminum sheet, and the method for identifying the nuclide based on the radiation information is: The attenuation degree of the nuclide sample is determined by the counts obtained by the scintillator probe under different absorption films, and the nuclide is then identified based on the attenuation degree.

[0039] The above method can automatically complete the switching of absorbent sheets in the same area, and uses the mass absorption method as the theoretical basis to efficiently complete the experiment; by designing multiple absorbent sheet placement areas on the feeding tray, multiple absorbent sheets can be placed, and when switching the absorbent sheets, only the rotation of the servo motor needs to be controlled, which overcomes the low efficiency of traditional manual switching of absorbent sheets.

[0040] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radionuclide identification system, characterized in that: include A sample placement module, used for placing radionuclide samples; An absorption sheet module, located above the sample placement module, has a plurality of absorption sheets of different types, and is used for attenuating the absorption of the radiation emitted by the nuclide; A collection module, located above the absorption sheet placement module, for collecting information of rays after passing through the absorption sheet; as well as The processing module includes a control unit and an analysis unit. The control unit is used to control the absorption sheet module to switch the absorption sheet. The analysis unit is connected to the acquisition module and is used to analyze the ray information.

2. A radionuclide identification system according to claim 1, characterized in that: The absorption sheet module includes a feeding tray, a driving member and a plurality of absorption sheets of different models; The feeding tray is provided with a plurality of evenly spaced absorption sheet placement areas, each of which has through holes, and the absorption sheets are placed in the absorption sheet placement areas, and the number of the absorption sheet placement areas is not less than the number of the absorption sheets; The driving member is drivingly connected to the feeding tray, and drives the feeding tray to regularly transport the absorption sheet to the top of the nuclide sample.

3. A radionuclide identification system according to claim 2, characterized in that: The driving member drives the feeding tray to rotate about a first axis, and a plurality of the absorbent sheet placement areas are evenly arranged in a circular array with the first axis as the center.

4. A radionuclide identification system according to claim 1, characterized in that: The sample placement module includes a feeding block, a discharging block and a cover plate; The material discharging block has a receiving groove for placing the nuclide sample, the cover plate covers the receiving groove, at least the surface of the material discharging block and the cover plate contacting the nuclide sample has a radiation shielding layer, and a guide hole penetrating the radiation shielding layer is opened on the cover plate; The discharge block is installed on the feeding block, and the feeding block drives the discharge block to move in a directional manner under the action of an external force; After the material discharging block is located directly below the absorption sheet, the guide hole is located directly below the absorption sheet.

5. A radionuclide identification system according to claim 4, characterized in that: The feeding block is adapted with a directional track and a limit point.

6. A radionuclide identification system according to claim 1, characterized in that: The acquisition module comprises a probe and a probe fixing frame. The probe fixing frame is fixedly installed right above the absorption sheet module, and the probe is detachably installed on the probe fixing frame.

7. A method for identifying radionuclides, characterized in that: The method is implemented by a radionuclide identification system as claimed in any one of claims 1 to 6, and comprises the following steps: The nuclide sample is pushed to the position directly below the probe of the acquisition module by placing the module; The control unit controls the absorber module to move absorbers of different types between the probe and the nuclide sample in order, so that the probe, the designated absorber and the nuclide sample are on the same axis; The analysis unit obtains the radiation information collected by the probe under different absorption sheets, and identifies the nuclides according to the radiation information.

8. A method for identifying radionuclides according to claim 7, characterized in that: The method of moving the absorber sheet between the probe and the nuclide sample in order is: The driving member drives the feeding tray to rotate regularly according to the angle according to the control signal of the control unit; The feeding tray stops rotating after rotating to a designated position, and the designated absorption sheet is directly opposite to the probe; After an absorbent sheet stops for a set time or the driving member receives the next control signal, the driving member drives the feeding plate to continue rotating to another angle and rotates the next absorbent sheet to a specified position.

9. A method for identifying radionuclides according to claim 7, characterized in that: The probe is a scintillator probe, and the ray information is the counts obtained by the nuclide sample using the scintillator probe under the action of a designated absorption sheet.

10. A method for identifying radionuclides according to claim 9, characterized in that: The method of identifying nuclides based on radiation information is: The attenuation degree of the nuclide sample is determined by the counts obtained by the scintillator probe under different absorption films, and the nuclide is then identified based on the attenuation degree.

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