Quenching correction curve construction method, equipment, medium and product

Abstract

The embodiment of the invention relates to the technical field of nuclide measurement, and discloses a quenching correction curve construction method and device, a medium and a product. A series of quenching sources are prepared, and high pressure is calculated and measured according to the average energy of nuclides to be measured; based on the measurement high voltage, measuring a first energy spectrum of the series of quenching sources without an external gamma source and a second energy spectrum of the series of quenching sources with the external gamma source; spectrum stripping is carried out according to the first energy spectrum and the second energy spectrum, a spectrum of Nt and a spectrum of Nd of an external gamma source are obtained, and ES-TDCR values of the spectrum serve as quenching indication parameters; based on the nuclide high voltage of the series of quenching sources, measuring a third energy spectrum of the series of quenching sources without an external gamma source; calculating the efficiency of the series of sources according to the full spectrum counting rate of the third energy spectrum and the activity of the series of quenching sources; and generating a quenching correction curve according to the quenching indication parameter and the series of source efficiencies. The technical problem that an existing TDCR method is poor in low-activity sample measurement accuracy can be at least solved.

Description

Technical Field

[0001] The present application relates to the field of nuclide measurement technology, and in particular to a method, device, medium and product for constructing a quenching correction curve. Background Art

[0002] Liquid scintillation spectrometers are widely used in the measurement of low-background beta radionuclide activity, but accurately measuring the degree of quenching in low-background beta radioactive solutions is a technical challenge. Since the 1990s, the TDCR method, which calibrates the degree of quenching based on the ratio of three-tube coincidence counts to two-tube coincidence counts, has been widely used. The TDCR method uses the ratio of the sample source's two-tube coincidence counts to the three-tube coincidence counts to represent the degree of sample quenching, and uses the functional relationship between the TDCR value and the detection efficiency to complete the activity calculation of the sample source. Although this method is simple to obtain the quenching indicator parameters, it has obvious drawbacks. When the sample activity is too low, the two-tube coincidence counts and three-tube coincidence counts are small, the statistical error is large, and the data fluctuates greatly over a short period of time, resulting in the TDCR value stability and accuracy being unable to meet actual measurement requirements.

[0003] In addition, the SIE method (Spectral Index Extend) based on an external standard source is also used to measure quenching indicator parameters. Its principle is to place a gamma source inside the instrument and use the Compton platform of the gamma source for measurement. This method can obtain stable and accurate quenching indicator parameters under low activity conditions, but it also has shortcomings. The quenching indicator parameters must be measured under appropriate high pressure, which may cause the nuclide spectrum to compress. When the degree of quenching is high, the Compton platform spectrum will be deformed. At high nuclide activities, the energy spectrum count fluctuations are too greatly affected by the sample counts, resulting in incorrect SIE values. Summary of the Invention

[0004] One object of the present application is to provide a method, device, medium and product for constructing a quenching correction curve, at least to solve the technical problem of poor measurement accuracy of low-activity samples by the existing TDCR method.

[0005] To achieve the above objectives, some embodiments of the present application provide the following aspects:

[0006] In a first aspect, some embodiments of the present application also provide a method for constructing a quenching correction curve, comprising preparing a series of quenching sources, calculating a measurement high pressure based on the average energy of the nuclide to be measured; measuring a first energy spectrum of the series of quenching sources in the absence of an external γ source, and a second energy spectrum of the series of quenching sources in the presence of an external γ source based on the measurement high pressure; performing spectrum stripping based on the first energy spectrum and the second energy spectrum to obtain spectra of Nt and Nd of the external γ source, and using the ES-TDCR value of the spectrum as a quenching indication parameter; measuring a third energy spectrum of the series of quenching sources in the absence of an external γ source based on the nuclide high pressure of the series of quenching sources; calculating the series source efficiency based on the full spectrum count rate of the third energy spectrum and the activity of the series of quenching sources; and generating a quenching correction curve based on the quenching indication parameter and the series source efficiency.

[0007] In a second aspect, some embodiments of the present application further provide an electronic device comprising: one or more processors; and a memory storing computer program instructions, wherein the computer program instructions, when executed, cause the processor to perform the steps of the method described above.

[0008] In a third aspect, some embodiments of the present application further provide a computer-readable medium having computer program instructions stored thereon, wherein the computer program instructions can be executed by a processor to implement the method described above.

[0009] In a fourth aspect, some embodiments of the present application further provide a computer program product, comprising a computer program / instruction, which implements the steps of the above-described method when executed by a processor.

[0010] Compared with related technologies, the solution provided in the embodiments of the present application establishes a three-tube coincident energy spectrum quenching indication parameter and quenching correction curve method based on an external standard source to address the problems of poor measurement accuracy and stability of the TDCR method for low-activity samples, and low measurement accuracy of the SIE method for high quenching degree and flat-bottom, high-activity samples. This achieves the goal of being applicable to various quenching degree and sample activity scenarios and accurately and stably feeding back the sample quenching indication parameter value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0012] Figure 1 A schematic diagram of a process for constructing a quenching correction curve according to an embodiment of the present application;

[0013] Figure 2Schematic diagram of the effect of a quenching correction curve construction method provided in an embodiment of the present application;

[0014] Figure 3 A flow chart of a method for establishing a quenching correction curve according to an embodiment of the present application;

[0015] Figure 4 The figure is a structural diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0016] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0017] The following terms are used in this article.

[0018] TDCR method: This method, short for Triple to Double Coincidence Ratio, is based on the principle that the ratio of the sample source's two-tube coincidence counts to the three-tube coincidence counts is functionally related to the degree of sample quenching. The advantage of this method is that the quenching indicator parameter is easily obtained. However, the disadvantage is that the source of the TDCR value is closely related to the sample's own counts. When the sample activity is too low, the two-tube and three-tube coincidence counts are also low, and the data fluctuates greatly over short periods of time. This results in the TDCR value's stability and accuracy not meeting practical requirements during actual measurements.

[0019] SIE method: The full name of this method is Spectral Index Extend. Its principle is to place a gamma source inside the instrument and use the Compton platform of the gamma source to measure the quenching indicator parameter. The advantage of this method is that the source of the quenching indicator parameter is a gamma source with high activity, so even under low activity conditions, stable and accurate quenching indicator parameters can be obtained. The disadvantage of this method is that the quenching indicator parameter needs to be at a suitable high pressure, but this high pressure may cause compression of the nuclide spectrum, which in turn leads to deformation of the Compton platform spectrum under high quenching conditions. Under high nuclide activity conditions, the energy spectrum count fluctuation is too greatly affected by the sample count, and the SIE value is incorrect.

[0020] TDCR: The ratio of the three-tube coincidence counts contributed by the sample source to the two-tube coincidence counts, generally used as a quenching indicator parameter;

[0021] ES-TDCR: The ratio of the three-tube coincidence counts to the two-tube coincidence counts contributed by the pure spectrum of the external gamma source, used as a quenching indicator parameter;

[0022] Nd: two tubes coincide with the count;

[0023] Nt: three-tube coincidence count;

[0024] Quenching indicator parameter: A term used to reflect the degree of quenching inside the liquid.

[0025] First embodiment

[0026] The first embodiment of the present application relates to a method for constructing a quenching correction curve. Figure 1 As shown, the method may include the following steps:

[0027] S101, prepare a series of quenching sources and calculate the measured high voltage according to the average energy of the nuclide to be measured:

[0028] A series of quenching sources is prepared to simulate varying degrees of quenching, enabling a comprehensive study of its impact on measurement results. Calculating the high measurement voltage based on the average energy of the nuclide being measured ensures the measurement equipment operates optimally for that specific nuclide, improving measurement accuracy and sensitivity. Because different nuclides have varying average energies, their detector signal responses vary. An appropriate high measurement voltage enables the detector to better resolve and capture the signal of that nuclide.

[0029] S102: Based on the high voltage measurement, measuring a first energy spectrum of the series of quenching sources without an external γ source, and a second energy spectrum of the series of quenching sources with an external γ source:

[0030] Measuring the energy spectrum with and without an external gamma source provides the necessary data for subsequent spectrum stripping. By comparing the energy spectra in these two situations, we can clearly understand the impact of the external gamma source on the measurement results, thereby accurately isolating the contribution of the external gamma source.

[0031] S103, performing spectrum stripping according to the first energy spectrum and the second energy spectrum to obtain spectra of Nt and Nd of the external γ source, and using the ES-TDCR value of the spectra as a quenching indication parameter:

[0032] The spectrum stripping operation accurately separates the contribution of the external gamma source from the mixed energy spectrum, obtaining the Nt (three-tube coincidence counting) and Nd (two-tube coincidence counting) spectra of the external gamma source. This helps eliminate interference from other factors and focuses only on the interaction between the external gamma source and the quenching source, thereby more accurately assessing the degree of quenching.

[0033] Using the ES-TDCR value (external standard source three-tube two-tube coincidence ratio) of the spectrum as a quenching indicator parameter allows quantifying the degree of quenching with a specific numerical value. The ES-TDCR value is unaffected by the sample source count and more accurately reflects quenching than the traditional TDCR value, providing a reliable basis for generating subsequent quenching correction curves.

[0034] S104, based on the nuclide high pressure of the series of quenching sources, measuring the third energy spectrum of the series of quenching sources in the absence of an external gamma source; calculating the series source efficiency according to the full spectrum count rate of the third energy spectrum and the activity of the series of quenching sources:

[0035] Measuring the third energy spectrum using a series of quenched nuclides at high pressure can more accurately reflect the decay characteristics of the nuclides themselves, eliminating interference from external gamma sources. Because the high pressure is specifically set based on the characteristics of the nuclides, measuring the energy spectrum at this high pressure can more accurately obtain the signal generated by the nuclides' decay.

[0036] The series source efficiency is calculated from the full-spectrum count rate of the third energy spectrum and the activity of the series quenched source. Source efficiency is an important indicator of the detector's ability to detect nuclide decay signals. Accurately calculating source efficiency helps understand the detector's performance under different quenching conditions and provides a key parameter for subsequent calibration and measurement.

[0037] S105, generating a quenching calibration curve according to the quenching indication parameter and the series source efficiency:

[0038] The quenching correction curve intuitively shows the relationship between the quenching indicator parameter and the series source efficiency. Using this curve, when the quenching indicator parameter is known, the corresponding source efficiency can be quickly and accurately calculated, thereby correcting the measurement results.

[0039] In actual measurements, samples may be affected by varying degrees of quenching, resulting in inaccurate results. Using a quenching correction curve, you can correct the measurement results to eliminate the effects of quenching, improve measurement accuracy and reliability, and bring the results closer to the true value.

[0040] Second embodiment

[0041] The second embodiment of the present application relates to a method for constructing a quenching calibration curve. The second embodiment is an improvement on the first embodiment, and the specific improvements are:

[0042] Furthermore, the first energy spectrum and the second energy spectrum are stripped to obtain a pure external γ source energy spectrum, Nd and Nt; and the ES-TDCR=Nt / Nd is calculated.

[0043] Furthermore, the calculation of the series source efficiency includes: EFF=ND / A, wherein EFF is the series source efficiency, ND is the full spectrum count rate of the third energy spectrum, and A is the activity of the series quenching source.

[0044] Furthermore, generating the quenching correction curve includes: calculating the quenching indication parameter and series source efficiency corresponding to each quenching source in the series of quenching sources, drawing and fitting the quenching correction curve; and obtaining a functional relationship between the quenching indication parameter and the series source efficiency according to the quenching correction curve.

[0045] Furthermore, the method also includes: when measuring the sample, based on the measurement high voltage, measuring a first sample energy spectrum in the absence of an external γ source, and a second sample energy spectrum in the presence of an external γ source; when measuring the sample, based on the nuclide high voltage, measuring a third sample energy spectrum in the absence of an external γ source; performing spectrum stripping based on the first sample energy spectrum and the second sample energy spectrum to obtain spectra of Nt and Nd of the external γ source of the sample, and using the TDCR value of the spectrum as a sample quenching indication parameter; substituting the sample quenching indication parameter into the quenching correction curve to obtain the detection efficiency of the sample.

[0046] Furthermore, the method further includes: obtaining Nd counts from the third sample energy spectrum, and calculating the sample activity based on the Nd counts of the sample and the detection efficiency of the sample.

[0047] Furthermore, the calculation of the sample activity includes: A=Nd / Eff, wherein A is the sample activity, Nd is the Nd count obtained from the third sample energy spectrum, and Eff is the detection efficiency of the sample.

[0048] (1) Prepare a series of quenching sources, assuming 10 bottles, 14C;

[0049] (2) Under the conditions of V = 45Ca, T = 30s, measure the series of quenching sources with i = 1 and obtain the energy spectrum SPE1;

[0050] (3) Under the conditions of V = 45Ca, T = 30s, measure the series of quenching source + external γ source with i = 1 and obtain the energy spectrum SPE2;

[0051] (4) Under the conditions of V = 14C, T = 300s, measure the series of quenching sources with i = 1 and obtain the energy spectrum SPE3;

[0052] (5) Strip the Nt and Nd data to generate new Nt and Nd spectra of the external γ source, and calculate the Nti and Ndi values ​​of the new spectra;

[0053] (6) Using the TDCR value of the pure spectrum of the external standard source as the quenching indicator parameter, TDCRi = Nti / Ndi;

[0054] (7) Since the full spectrum count rate of SPE3 and the activity of the series source are known, the efficiency of the series source SPE3 can be calculated: EFFi = Ndi / Ai;

[0055] (8) Repeat steps 2 to 7 until all series of quenching source measurements are completed;

[0056] (9) Draw and fit the curve of (ES-TDCRi, EFFi), which is the external γ source quenching curve, and fit it to obtain the functional relationship between ES-TDCR and EFF: F(ES-TDCR, EFF).

[0057] (10) When measuring the sample, the first measurement is performed under the conditions of V = 45Ca, T = 30s, and no external γ source, and the energy spectrum SPE1 is obtained; the second measurement is performed under the conditions of V = 45Ca, T = 30s, and an external γ source, and the energy spectrum SPE2 is obtained; finally, the unknown sample is measured under the conditions of high nuclide pressure and no external γ source, and the measurement time is customized by the customer, and the energy spectrum SPE3 is obtained;

[0058] (11) Similarly, SPE2-SPE1 is used to perform spectrum stripping to generate new Nt and Nd spectra of the external γ source, and the Nt and Nd values ​​of the new spectra are calculated. The Nt and Nd values ​​are used to obtain the unknown quenching indicator parameter ES-TDCR.

[0059] (12) Substitute the ES-TDCR value of the unknown sample into the previously established fitting curve F(ES-TDCR, EFF) to obtain the detection efficiency Eff of the unknown sample.

[0060] Obtain the Nd count of the sample from SPE3, and the sample activity A = Nd / Eff.

[0061] like Figure 2 As shown, the pure spectrum of the external standard source 133Ba is obtained by the spectrum stripping technology, and then the ES-TDCR value is calculated. This method can solve the following problems: eliminate the influence of sample activity on the accuracy of the quenching indication parameter; in particular, eliminate the error of the quenching indication parameter caused by the energy spectrum compression of 3H under the external standard source measurement condition; eliminate the foldback phenomenon of the quenching correction curve under the condition of low quenching and high activity of the external standard source.

[0062] This application effectively overcomes existing technical bottlenecks by establishing quenching indicator parameters and quenching correction curves using a three-tube sample spectral index that matches the energy spectrum. Addressing the limited accuracy and stability of the TDCR method for low-activity sample measurements, field measurements have shown that this application improves accuracy and stability by threefold for samples as low as 10 Bq / L, effectively ensuring the reliability of low-activity sample measurements.

[0063] Third embodiment

[0064] The third embodiment of the present application relates to a method for constructing a quenching correction curve. The second embodiment is an improvement based on the first embodiment, and the specific improvements are:

[0065] like Figure 3 As shown, determine the main measurement nuclides and clarify the nuclides to be measured (such as nuclide A to be measured, nuclide B to be measured, etc.); obtain the average energy E1 of nuclide A to be measured, the average energy E2 of nuclide B to be measured, etc.; calculate the measurement high voltage, and calculate the external standard source measurement high voltage based on the average energy of the nuclides.

[0066] At the aforementioned high measurement pressure, the nuclide is measured without an external gamma source, obtaining a three-tube coincidence count spectrum, SPECa. At the same high measurement pressure, the nuclide is measured with an external gamma source, obtaining a spectrum, SPECTb. By subtracting SPECb from SPECa, a pure external gamma source spectrum is obtained, and the two-tube coincidence counts, NDa, and the three-tube coincidence counts, NTa, are extracted. ES-TDCRi = NTa / NDa is calculated, and the standard source i and activity Ai are introduced into the series quenching source.

[0067] The three-tube coincidence counting spectrum, SPECi, and NDi, is acquired under high-pressure conditions and with or without a gamma source. The measurement efficiency of standard source i is calculated using the formula EFFi = NDi / ES-TDCRi. The measurement of all standard sources in the quenching source series is determined by checking whether all standard sources have been measured. If not, the measurement returns to the next standard source (a, b, e, i++). If the standard source is measured, the (ES-TDCR, EFF) is established and the function F(ES-TDCR, EFF) is fitted.

[0068] The step division of the above various methods is only for the purpose of clear description. During implementation, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this application; adding insignificant modifications or introducing insignificant designs to the algorithm or process without changing the core design of the algorithm and process are all within the scope of protection of this application.

[0069] In addition, some embodiments of the present application further provide an electronic device. The electronic device may be various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, etc. The electronic device may also be various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices.

[0070] The electronic device includes: one or more processors; and a memory storing computer program instructions, wherein the computer program instructions, when executed, enable the processor to perform the steps of the method provided in any one or more of the above embodiments. Figure 4 An exemplary structural diagram of the electronic device is disclosed. Figure 4 As shown, the electronic device includes: one or more processors 1101, a memory 1102, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on the memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple electronic devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Among them, the components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present application described and / or required herein.

[0071] The electronic device may further include: an input device 1103 and an output device 1104. The processor 1101, the memory 1102, the input device 1103 and the output device 1104 may be connected via a bus or other means. Figure 4 The bus connection is taken as an example.

[0072] The input device 1103 can receive input digital or character information and generate key signal input related to user settings and function control of the electronic device, such as input devices such as a touch screen, a keypad, a mouse, a trackpad, a touch pad, an indicator stick, one or more mouse buttons, a trackball, and a joystick. The output device 1104 can include a display device, an auxiliary lighting device (e.g., an LED), and a tactile feedback device (e.g., a vibration motor). The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0073] To provide interaction with a user, the electronic device may be a computer. The computer may include: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball), through which the user can provide input to the computer. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0074] In the embodiments of the present application, a computer program / instruction is stored on a computer-readable medium. When executed by a processor, the computer program / instruction implements the steps of the method provided in any one or more of the above embodiments. The computer-readable medium may be included in the electronic device described in the above embodiments, or it may exist independently and not be incorporated into the device. The computer-readable medium carries one or more computer-readable instructions.

[0075] The memory 1102 can be used as a non-transitory computer-readable storage medium to store non-transitory software programs, non-transitory computer executable programs, and modules. The processor 1101 executes the non-transitory software programs, instructions, and modules stored in the memory 1102 to execute various functional applications and data processing of the server, thereby implementing the program instructions / modules corresponding to the method provided in any one or more of the above embodiments of the present application.

[0076] The memory 1102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device, etc. In addition, the memory 1102 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 1102 may optionally include a memory remotely located relative to the processor 1101, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0077] It should be noted that the computer-readable medium described in this application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. The computer-readable medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, device or component, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this application, a computer-readable medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or device.

[0078] Computer-readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology for information storage. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc-read only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0079] Computer program code for performing the operations of the present application can be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0080] In the above-described embodiment, can realize wholly or in part by software, hardware, firmware or its arbitrary combination.For example, can adopt application-specific integrated circuit (ASIC), general computer or any other similar hardware device to realize.In certain embodiments, the software program of the present application can be carried out to realize above steps or function by processor.Similarly, the software program of the present application (comprising relevant data structure) can be stored in computer-readable recording medium, for example, RAM memory, magnetic or optical drive or floppy disk and similar device.In addition, some steps or functions of the present application can adopt hardware to realize, for example, as the circuit that cooperates with processor to perform each step or function.

[0081] The computer program product provided by the embodiment of the present application includes one or more computer programs / instructions, and when the computer program / instructions are executed by the processor, all or part of the process or function described in the embodiment of the present application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction can be transmitted from a website site, a computer, a server or a data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium can be a magnetic medium, (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid-state hard disk (SSD)).

[0082] The flowcharts or block diagrams in the accompanying drawings illustrate the possible architectures, functions and operations of the devices, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of code, and the module, program segment or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, as well as the combination of boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-specific system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0083] The scope of this application is defined by the appended claims rather than the foregoing description and is therefore intended to encompass within this application all changes that come within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which they relate. In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in a device claim may also be implemented by one unit or device through software or hardware. Words such as "first" and "second" are only used to distinguish the description and do not indicate any particular order, nor should they be understood as indicating or implying relative importance.

[0084] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art may easily propose variations or substitutions within the technical scope disclosed in the present application, and such variations or substitutions shall be encompassed within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims, and the above embodiments shall be regarded as exemplary and non-limiting.

Claims

1. A method for constructing a quenching correction curve, characterized in that: The method comprises: Prepare a series of quenching sources and calculate the measured high voltage based on the average energy of the nuclide to be measured; Based on the measurement high voltage, measuring a first energy spectrum of the series of quenching sources in the absence of an external γ source, and a second energy spectrum of the series of quenching sources in the presence of an external γ source; Stripping the spectrum according to the first energy spectrum and the second energy spectrum to obtain spectra of Nt and Nd of the external γ source, and using the ES-TDCR value of the spectrum as a quenching indicator parameter; Based on the nuclide high pressure of the series of quenching sources, measuring the third energy spectrum of the series of quenching sources in the absence of an external gamma source; calculating the series source efficiency according to the full spectrum count rate of the third energy spectrum and the activity of the series of quenching sources; A quenching calibration curve is generated based on the quenching-indicating parameter and the series of source efficiencies.

2. The method according to claim 1, characterized in that The ES-TDCR values ​​include: The first energy spectrum and the second energy spectrum are stripped to obtain a pure external gamma source energy spectrum, Nd and Nt; and the ES-TDCR=Nt / Nd is calculated.

3. The method according to claim 2, characterized in that The calculation series source efficiency includes: EFF=ND / A, wherein EFF is the efficiency of the series sources, ND is the full spectrum count rate of the third energy spectrum, and A is the activity of the series quenching sources.

4. The method according to claim 3, characterized in that Generating a quenching correction curve comprises: Calculating the quenching indication parameter and the series source efficiency corresponding to each quenching source in the series of quenching sources, and drawing and fitting the quenching calibration curve; The functional relationship between the quenching indication parameter and the series source efficiency is obtained according to the quenching calibration curve.

5. The method according to claim 4, characterized in that The method further comprises: When measuring a sample, based on the measurement high voltage, measuring a first sample energy spectrum without an external gamma source and a second sample energy spectrum with an external gamma source; When measuring the sample, based on the nuclide high pressure, measuring the energy spectrum of the third sample in the absence of an external gamma source; Stripping the spectrum according to the first sample energy spectrum and the second sample energy spectrum to obtain Nt and Nd spectra of the external γ source of the sample, and using the TDCR value of the spectrum as a sample quenching indicator parameter; Substitute the sample quenching indication parameter into the quenching calibration curve to obtain the detection efficiency of the sample.

6. The method according to claim 5, characterized in that The method further comprises: Nd counts are obtained from the energy spectrum of the third sample, and the sample activity is calculated based on the Nd counts of the sample and the detection efficiency of the sample.

7. The method according to claim 6, characterized in that The calculating sample activity comprises: A=Nd / Eff, where A is the sample activity, Nd is the Nd count obtained from the third sample energy spectrum, and Eff is the detection efficiency of the sample.

8. An electronic device, characterized in that: The electronic device comprises: one or more processors; and A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method according to any one of claims 1 to 7.

9. A computer-readable medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

Images