Anti-Compton high-purity germanium gamma spectrometer detector system

Abstract

The invention provides an anti-Compton high-purity germanium gamma spectrometer detector system, and the system comprises a main detector which is a high-purity germanium detector and is used for detecting gamma rays in a sample and outputting a first electric signal; the anti-constancy detector surrounds the main detector so as to form a wrapping structure with a 4 pi solid angle, and is used for detecting the gamma rays generating the Compton effect and outputting a second electric signal; the coincidence / anticoincidence unit is used for receiving the first electric signal and the second electric signal and generating an anticoincidence logic signal when the first electric signal is coincident with the second electric signal; the multichannel analyzer is electrically connected with the main detector and the coincidence / anticoincidence unit, and is used for processing the first electric signal to generate gamma energy spectrum data when the anticoincidence logic signal is not received; and the shielding device surrounds the main detector and the anti-health detector and is used for shielding background radiation. The detector system is used for solving the technical problem that a Compton scattering peak in a high-level radioactive sample covers a low-energy peak, so that the detection capability of gamma nuclide in a low-energy region is weak.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of radiation measurement, and particularly relates to a reverse Compton high-purity germanium gamma spectrometer detector system. BACKGROUND

[0002] The high-level radioactive sample in the reprocessing process has the characteristics of high radioactivity level and complex chemical composition. The energy and content of different gamma radionuclide rays in the high-level process liquid sample are different, and the main gamma radioactivity comes from 137 Cs (661.6 keV), which is caused by 137 The Compton scattering plateau caused by the Cs radionuclide will interfere with the measurement of other low-energy radionuclides.

[0003] At present, the analysis method of the HPGe (high-purity germanium) gamma spectrometer in the reprocessing plant mainly has the following problems: the Compton scattering peak generated by the medium and high-energy radionuclide such as Cs in the high-level sample will completely cover the low-energy area gamma radionuclide, resulting in weak detection ability of the low-energy area gamma radionuclide. 137 The Compton scattering peak generated by the medium and high-energy radionuclide such as Cs in the high-level sample will completely cover the low-energy area gamma radionuclide, resulting in weak detection ability of the low-energy area gamma radionuclide. SUMMARY

[0004] The technical problem to be solved by the application is to provide a reverse Compton high-purity germanium gamma spectrometer detector system to solve the problem that the Compton scattering peak covers the low-energy peak in the high-level sample, resulting in weak detection ability of the low-energy area gamma radionuclide.

[0005] The application provides a reverse Compton high-purity germanium gamma spectrometer detector system, which comprises: a main detector, which is a high-purity germanium detector, is used for detecting gamma rays in a sample and outputting a first electric signal; a reverse Compton detector, which is surrounded around the main detector to form a 4π solid angle wrapping structure, is used for detecting gamma rays scattered due to Compton effect from the main detector and outputting a second electric signal; a coincidence / anticoincidence unit, which is electrically connected with the main detector and the reverse Compton detector, is used for receiving the first electric signal and the second electric signal and generating an anti-coincidence logic signal when the first electric signal and the second electric signal coincide; and a multichannel analyzer, which is electrically connected with the main detector and the coincidence / anticoincidence unit, is used for processing the first electric signal to generate gamma spectrum data when the anti-coincidence logic signal is not received; and a shielding device, which surrounds the main detector and the reverse Compton detector, is used for shielding background radiation.

[0006] In some embodiments, the reverse Compton high-purity germanium gamma spectrometer detector system further comprises a collimation device arranged between the sample and the main detector. The collimation device comprises a collimator and a driving mechanism, and the collimator is provided with at least two collimation holes with different apertures. The driving mechanism is used to drive the collimator to move so as to select the collimation hole with different apertures on the collimator to move to the incident path of the main detector.

[0007] In some embodiments, the collimation device further includes a control unit. The control unit is used to receive a count rate signal from the main detector and, based on the count rate signal, control a drive mechanism to select a collimating aperture with an aperture matching the current count rate and move it onto the incident path.

[0008] In some embodiments, the collimation device further includes a calibration source holder. The control unit is also configured to, in automatic calibration mode, control the drive mechanism to move a collimation aperture of a specified diameter onto the incident path, and control the calibration source holder to move the calibration source to the measurement position.

[0009] In some embodiments, the anti-Compton high-purity germanium gamma spectrometer detector system further includes a main detector assembly, an anti-Compton detector assembly, and a gating module.

[0010] The main detector assembly includes a first amplifier and a first single-channel analyzer. The first amplifier, electrically connected to the main detector, amplifies a first electrical signal. The first single-channel analyzer, electrically connected to the first amplifier and a coincidence / anti-coincidence unit, performs time analysis on the first electrical signal output from the first amplifier and outputs a first logic signal to the coincidence / anti-coincidence unit. The anti-coincidence detector assembly includes a second amplifier and a second single-channel analyzer. The second amplifier, electrically connected to the anti-coincidence detector, amplifies a second electrical signal. The second single-channel analyzer, electrically connected to the second amplifier and a coincidence / anti-coincidence unit, performs time analysis on the second electrical signal output from the second amplifier and outputs a second logic signal to the coincidence / anti-coincidence unit. The coincidence / anti-coincidence unit generates an anti-coincidence logic signal when the first logic signal coincides with the second logic signal. The first input terminal of the gating module is electrically connected to the first amplifier, and its second input terminal is electrically connected to the coincidence / anti-coincidence unit. Upon receiving the first electrical signal output from the first amplifier, if no anti-coincidence logic signal is received within a preset gating delay time, a digital gating pulse is generated. A multichannel analyzer, electrically connected to the gating module, is used to process the first electrical signal to generate gamma spectrum data upon receiving a digital gating pulse.

[0011] In some embodiments, the anti-Compton high-purity germanium gamma-ray spectrometer detector system further includes a cooling device. The cooling device is connected to the high-purity germanium detector and is used to cool and maintain the high-purity germanium detector at its operating temperature.

[0012] In some embodiments, the anti-Kon detector is any one of the following: a sodium iodide detector, a plastic scintillator, or a bismuth germanate detector.

[0013] In some embodiments, both the main detector and the anti-Kon detector are cylindrical structures.

[0014] In some embodiments, a gap is provided between the main detector and the anti-detector, and the gap width ranges from [3 to 6] mm.

[0015] In some embodiments, the shielding device is lead shielded, the collimation device is located in the shielding device, and the cooling device is connected to the main detector through a pipe and is located outside the shielding device.

[0016] The anti-Compton high-purity germanium gamma spectrometer detector system provided by this invention surrounds the main detector to form a 4π solid angle enclosure structure, which can effectively suppress Compton plateau counting in the low-energy region and achieve effective identification of gamma nuclides in the low-energy region. Ultimately, the anti-Compton high-purity germanium gamma spectrometer detector system has high energy resolution and extremely low background level, enabling high-resolution identification and highly sensitive quantitative measurement of trace gamma nuclides in complex samples.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the anti-Compton principle of an anti-Compton high-purity germanium gamma spectrometer detector system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the measurement principle of an anti-Compton high-purity germanium gamma spectrometer detector system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the architecture of an anti-Compton high-purity germanium gamma spectrometer detector system provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the external structure of an anti-Compton high-purity germanium gamma spectrometer detector system provided in an embodiment of the present invention; Figure 5 for Figure 4 Front sectional view.

[0019] In the figure: 1-Radioactive sample; 2-Collimation device; 3-First amplifier; 4-First single-channel analyzer; 5-Main detector; 6-Anti-coincidence detector; 7-Second amplifier; 8-Second single-channel analyzer; 9-Coincidence / anti-coincidence unit; 10-Gating module; 11-Multichannel analyzer; 12-Shielding device; 13-Refrigeration device. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0021] Where there is no conflict, the various embodiments of the present invention and the features thereof may be combined with each other.

[0022] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0023] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded. Terms such as “connected” or “linked” are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art and the invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein.

[0025] This embodiment provides an anti-Compton high-purity germanium gamma spectrometer detector system, which is used to measure the activity concentration of gamma radionuclides in high-level radioactive process liquid samples (i.e., liquid samples) of spent fuel reprocessing. It is mainly used for liquid sample measurement, but can also be applied to the measurement of other high-level solid samples.

[0026] like Figure 1 , Figure 4 and Figure 5 As shown, the detector system of the anti-Compton high-purity germanium gamma spectrometer includes a main detector 5, an anti-Compton detector 6, a coincidence / anti-coincidence unit, a multichannel analyzer, and a shielding device 12. The main detector 5 and the anti-Compton detector 6 are located inside the shielding device 12, while the multichannel analyzer is located outside the shielding device 12.

[0027] The main detector 5 is a high-purity germanium detector used to detect gamma rays in sample 1 and output the first electrical signal.

[0028] The anti-Compton detector 6 surrounds the main detector 5 to form a 4π solid angle enclosure structure. The anti-Compton detector 6 is used to detect gamma rays scattered from the main detector 5 by the Compton effect and outputs a second electrical signal.

[0029] The coincidence / anti-coincidence unit is electrically connected to the main detector 5 and the anti-coincidence detector 6. It is used to receive the first electrical signal and the second electrical signal, and generate an anti-coincidence logic signal when the first electrical signal coincides with the second electrical signal.

[0030] A multichannel analyzer, electrically connected to the main detector 5 and the coincidence / anti-coincidence unit, is used to process the first electrical signal to generate gamma spectrum data when no anti-coincidence logic signal is received.

[0031] The shielding device 12 surrounds the main detector 5 and the anti-can detector 6 and is used to shield the background radiation.

[0032] In this embodiment, a high-purity germanium detector is used as the main detector. The anti-Compton detector adopts a wrap-around design with a solid angle close to 4π to wrap the high-purity germanium detector, and combines an anti-coincidence algorithm with a coincidence / anti-coincidence unit to reduce the Compton plateau count and improve the detection capability of gamma nuclides in the low-energy region.

[0033] In some embodiments, the anti-Compton high-purity germanium gamma spectrometer detector system further includes a collimation device 2, which is disposed between the sample 1 and the main detector 5.

[0034] The collimation device 2 includes a collimator and a drive mechanism. The collimator is provided with at least two collimation holes of different diameters.

[0035] The drive mechanism is used to drive the collimator to move, so as to select the collimating holes of different diameters on it to move onto the incident path of the main detector 5.

[0036] In this embodiment, the collimator can be a collimator turntable or a collimator slider. Correspondingly, the driving mechanism is used to drive the collimator turntable to rotate or the collimator slider to move linearly, so as to select collimating holes of different diameters on it and move them to the incident path of the main detector 5. In this embodiment, the collimator is preferably a collimator slider.

[0037] In some embodiments, the collimating device 2 further includes a control unit. The control unit is used to receive the count rate signal from the main detector 5 and control the drive mechanism based on the count rate signal to select a collimating aperture with an aperture matching the current count rate and move it onto the incident path.

[0038] In related technologies, existing high-purity germanium gamma spectrometers often fail to measure high-level radioactive samples due to excessively high incident radiation flux, leading to system overload, energy spectrum data distortion, and ultimately, measurement failure. For example... Figure 2 As shown, in this embodiment, an automatic collimation device 2 controlled by a program is set in the incident path between the main detector 5 and the sample 1. This collimation device 2 can automatically switch collimation holes of different apertures according to the sample activity (such as the mapping relationship between sample activity and aperture) or the real-time count rate, so as to always adjust the gamma-ray flux within the optimal operating range of the detector system, so as to realize the measurement of activity concentration range of 1E+9Bq / l to 1E+13Bq / l, which is suitable for the scenario of automated measurement of high-radiation samples.

[0039] In some embodiments, the collimation device 2 further includes a calibration source holder. The control unit is also configured to, in automatic calibration mode, control the drive mechanism to move a collimation aperture of a specified diameter onto the incident path, and control the calibration source holder to move the calibration source to the measurement position.

[0040] In related technologies, the analytical methods of HPGe (high-purity germanium) gamma spectrometers in post-processing plants often fail to detect low measurement accuracy issues promptly after the instrument has been running for a period of time. Therefore, in this embodiment, the collimation device is also used for automatic calibration, which facilitates the timely detection and resolution of energy and efficiency drift problems during detector system operation, as well as regular maintenance (such as the control unit periodically initiating automatic calibration mode). Thus, the anti-Compton high-purity germanium gamma spectrometer detector system of this embodiment possesses an anti-Compton design for the automatic HPGe (high-purity germanium) gamma spectrometer detector, reducing the concentration of high activity in the sample system. 137 The Compton scattering plate generated by high-energy nuclides such as Cs interferes with the measurement of other low-energy nuclides. At the same time, based on the realization of automatic calibration and automatic collimation functions, it realizes the automatic analysis of the activity concentration of different nuclides in the feed solution.

[0041] like Figure 3 As shown, in some embodiments, the anti-Compton high-purity germanium gamma spectrometer detector system further includes a main detector assembly, an anti-Compton detector assembly, and a gating module 10.

[0042] The main detector assembly includes a first amplifier 3 and a first single-channel analyzer 4.

[0043] The first amplifier 3 is electrically connected to the main detector 5 and is used to amplify the first electrical signal.

[0044] The first single-channel analyzer 4 is electrically connected to the first amplifier 3 and the coincidence / anti-coincidence unit 9. It is used to perform time analysis on the first electrical signal output by the first amplifier 3 and output the first logic signal to the coincidence / anti-coincidence unit 9.

[0045] The anti-Kon detector assembly includes a second amplifier 7 and a second single-channel analyzer 8.

[0046] The second amplifier 7 is electrically connected to the anti-Cron detector 6 and is used to amplify the second electrical signal.

[0047] The second single-channel analyzer 8 is electrically connected to the second amplifier 7 and the coincidence / anti-coincidence unit 9. It is used to perform time analysis on the second electrical signal output by the second amplifier 7 and output a second logic signal to the coincidence / anti-coincidence unit 9.

[0048] The coincidence / anti-coincidence unit 9 is used to generate an anti-coincidence logic signal when the first logic signal coincides with the second logic signal.

[0049] The first input terminal of the gating module 10 is electrically connected to the first amplifier 3, and its second input terminal is electrically connected to the coincidence / anti-coincidence unit 9. When the first electrical signal output by the first amplifier 3 is received, if the anti-coincidence logic signal is not received within the preset gating delay time, a digital gating pulse is generated.

[0050] The multichannel analyzer 11, which is electrically connected to the gating module 10, is used to process the first electrical signal to generate γ-energy spectrum data when a digital gating pulse is received.

[0051] In this embodiment, the gamma rays are converted into a first electrical signal in the main detector. This signal is amplified and shaped by a first amplifier before entering the first single-channel analyzer 4 for time analysis. Combined with the time analysis results from the second single-channel analyzer 4, the signal is lowered to the Compton plateau after passing through the coincidence / anti-coincidence unit 9 and then enters the multichannel analyzer 11 through the gating module 10. The signal is then interpreted to determine the relationship between energy distribution and signal intensity, forming a measurement spectrum. Specifically, the single-channel analyzer first performs threshold analysis, and the selected gamma-ray signal enters the multichannel analyzer for energy spectrum analysis. This intercepts noise and dark current signals, resulting in a better peak shape in the characteristic energy peak region of the analyzed spectrum, which helps improve the detector's resolution.

[0052] In some embodiments, the anti-Compton high-purity germanium gamma spectrometer detector system further includes a cooling device 13.

[0053] The cooling device 13 is connected to the high-purity germanium detector and is used to cool the high-purity germanium detector and maintain it at its operating temperature.

[0054] In some embodiments, the anti-Kon detector 6 is any one of the following: a sodium iodide detector, a plastic scintillator, or a bismuth germanate detector.

[0055] In some embodiments, both the main detector 5 and the anti-detector 6 are cylindrical structures, or the anti-detector 6 is a circular inner and square outer structure. The circular inner and square outer structure means that the interior of the anti-detector 6 is a hollowed-out cylindrical structure used to house the cylindrical main detector 5, while its exterior is a square structure.

[0056] like Figure 1 As shown, the main detector 5 and the anti-Compton detector 6 are cylindrical structures, with the main detector 5 located in the center of the area enclosed by the anti-Compton detector 6, forming an optimal 4π solid angle enclosure structure. This allows the anti-Compton detector 6 to collect Compton gamma rays to the maximum extent, effectively suppressing the Compton plateau in the low-energy region of the gamma spectrum of high-energy samples, and improving the detection capability of gamma rays in the low-energy region.

[0057] In some embodiments, a gap is provided between the main detector 5 and the anti-detector 6, with a gap width ranging from [3 to 6] millimeters. The effect of this gap is to prevent heat conduction and to cool down the detector.

[0058] In some embodiments, the shielding device 12 is lead shielded, i.e., a lead chamber. The collimating device 2 is disposed within the shielding device 13. For example... Figure 4 , Figure 5 As shown, the cooling device 13 is connected to the main detector 5 through a pipe, and the cooling device 13 is located outside the shielding device 13.

[0059] The anti-Compton high-purity germanium gamma-ray spectrometer detector system of this embodiment utilizes an anti-Compton detector surrounding the main detector to form a 4π solid angle enclosure structure. This effectively suppresses Compton plateau counting in the low-energy region, enabling efficient identification of gamma nuclides in the low-energy region. Ultimately, the anti-Compton high-purity germanium gamma-ray spectrometer detector system possesses high energy resolution and extremely low background, achieving high-resolution identification and highly sensitive quantitative measurement of trace gamma nuclides in complex samples. Furthermore, the collimation device on the incident path can automatically switch between different aperture collimation holes based on sample activity or real-time count rate, thereby consistently adjusting the gamma-ray flux within the optimal operating range of the detector system and preventing system overload that could lead to measurement failure. In addition, automatic calibration facilitates the timely detection and resolution of energy and efficiency drift issues during detector system operation, as well as periodic maintenance and repair problems, improving the automation level of the detector system.

[0060] Specifically, this embodiment also provides a method for using the anti-Compton high-purity germanium gamma-ray spectrometer detector system, including: S1, the anti-Compton high-purity germanium gamma spectrometer detector system is powered on and passes self-test.

[0061] S2, background measurement check, confirming that the background levels of the main detector and the reverse detector are normal and there is no accidental contamination.

[0062] S3, place sample 1 for measurement and confirm that the sample is ready.

[0063] S4, begin measurement.

[0064] S5, During the measurement process, the working principle and procedure of the reverse compensator are explained as follows: S5.1, the gamma rays emitted by the radioactive sample 1, after passing through the collimator in the collimation device 2, irradiate the main detector 5 approximately in parallel.

[0065] S5.2, γ-rays generated by the Compton effect within the sensitive volume of the main detector 5 are scattered in all directions (reference). Figure 1 (Illustrative effect).

[0066] S5.3, the 4π-enclosed anti-cannon detector 6 used in this embodiment can, in principle, capture γ-rays scattered from the main detector 5 from all directions.

[0067] S5.4 The scattered gamma-ray energy captured by the anti-Kon detector 6 is converted into an electrical signal and output to the second amplifier. Then, it passes through the second single-channel analyzer and enters the coincidence / anti-coincidence unit.

[0068] S5.5 All the gamma-ray energy captured in the main detector 5 is converted into an electrical signal and output to the first amplifier. Then, after passing through the first single-channel analyzer, it enters the coincidence / anti-coincidence unit as another signal.

[0069] S5.6 The signal processed by the coincidence / anti-coincidence unit is output as a gating signal to the gating module.

[0070] S5.7, the gating module is used to control the input signals of the multichannel analyzer, thereby realizing the anti-counterfeiting function.

[0071] S6, complete the measurement, save the original measurement spectrum, record the measurement data, and analyze the results and data trends.

[0072] S7, remove the sample and recheck whether the background levels of the main detector and the reverse detector are normal.

[0073] S8, measurement complete.

[0074] In summary, the anti-Compton high-purity germanium gamma spectrometer detector system provided in this implementation case solves the problem of weak detection capability of low-energy region radiation caused by the Compton effect when measuring the gamma energy spectrum of high-release liquid in spent fuel reprocessing.

[0075] Those skilled in the art will understand that all or some of the steps, systems, and apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as integrated circuits, such as application-specific integrated circuits (ASICs).

[0076] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for illustrative purposes only and should be construed as such, and is not intended to be limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of the invention as set forth in the appended claims.

Claims

1. A detector system for an anti-Compton high-purity germanium gamma spectrometer, characterized in that, include: The main detector (5) is a high-purity germanium detector used to detect γ-rays in the sample (1) and output the first electrical signal; An anti-Compton detector (6) surrounds the main detector (5) to form a 4π solid angle enclosure structure. The anti-Compton detector (6) is used to detect γ rays scattered from the main detector (5) by the Compton effect and output a second electrical signal. The coincidence / anti-coincidence unit (9) is electrically connected to the main detector (5) and the anti-coincidence detector (6), and is used to receive the first electrical signal and the second electrical signal, and generate an anti-coincidence logic signal when the first electrical signal coincides with the second electrical signal; A multichannel analyzer, electrically connected to the main detector (5) and the coincidence / anti-coincidence unit, is used to process the first electrical signal to generate γ energy spectrum data when the anti-coincidence logic signal is not received; A shielding device (12) surrounds the main detector (5) and the anti-Kon detector (6) for shielding background radiation.

2. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, It also includes a collimation device (2), which is located between the sample (1) and the main detector (5); The collimation device (2) includes a collimator and a driving mechanism, wherein the collimator is provided with at least two collimation holes of different diameters; The driving mechanism is used to drive the collimator to move, so as to select the collimating holes of different diameters on it to move onto the incident path of the main detector (5).

3. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 2, characterized in that, The collimation device (2) also includes a control unit; The control unit is used to receive the count rate signal of the main detector (5) and control the drive mechanism based on the count rate signal to select the collimating aperture with an aperture matching the current count rate and move it onto the incident path.

4. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 3, characterized in that, The collimation device (2) also includes a calibration source frame; The control unit is also used to control the drive mechanism to move the collimating aperture of a specified diameter onto the incident path in automatic calibration mode, and to control the calibration source holder to move the calibration source to the measurement position.

5. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, It also includes the main detector assembly, the anti-detection detector assembly, and the gating module; The main detector assembly includes a first amplifier and a first single-channel analyzer; The first amplifier is electrically connected to the main detector (5) and is used to amplify the first electrical signal; The first single-channel analyzer is electrically connected to the first amplifier and the coincidence / anti-coincidence unit, and is used to perform time analysis on the first electrical signal output by the first amplifier and output a first logic signal to the coincidence / anti-coincidence unit; The anti-Cron detector assembly includes a second amplifier and a second single-channel analyzer; The second amplifier is electrically connected to the anti-Cron detector (6) and is used to amplify the second electrical signal; The second single-channel analyzer is electrically connected to the second amplifier and the coincidence / anti-coincidence unit, and is used to perform time analysis on the second electrical signal output by the second amplifier, and output a second logic signal to the coincidence / anti-coincidence unit; The coincidence / anti-coincidence unit is used to generate an anti-coincidence logic signal when the first logic signal coincides with the second logic signal; The first input terminal of the gating module is electrically connected to the first amplifier, and its second input terminal is electrically connected to the coincidence / anti-coincidence unit. When the first electrical signal output by the first amplifier is received, if the anti-coincidence logic signal is not received within a preset gating delay time, a digital gating pulse is generated. The multichannel analyzer is electrically connected to the gating module and is used to process the first electrical signal to generate γ-energy spectrum data when the digital gating pulse is received.

6. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, It also includes a refrigeration unit (13); The cooling device (13) is connected to the high-purity germanium detector and is used to cool the high-purity germanium detector and maintain it at its operating temperature.

7. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, The anti-Kon detector (6) is any one of the following: sodium iodide detector, plastic scintillator, or bismuth germanate detector.

8. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, Both the main detector (5) and the anti-con detector (6) are cylindrical structures.

9. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, A gap is provided between the main detector (5) and the anti-detector (6), and the width of the gap is in the range of [3~6] mm.

10. The anti-Compton high-purity germanium gamma spectrometer detector system according to claim 1, characterized in that, The shielding device is made of lead shielding, the collimation device (2) is located in the shielding device, the cooling device (13) is connected to the main detector (5) through a pipe, and the cooling device (13) is located outside the shielding device.

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