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Lamination scintillation type anti-compton gamma spectrometer

A Compton gamma spectrometer and stacking technology, applied in the field of radiation detection, can solve the problems of increasing equipment complexity and cost, increase the portability and flexibility of the instrument, simplify the measurement system, and reduce the complexity of the instrument and cost effects

Pending Publication Date: 2018-09-14
CHINA INST FOR RADIATION PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This traditional design method requires two spectrometers and an additional coincidence circuit, which increases the complexity and cost of the equipment

Method used

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  • Lamination scintillation type anti-compton gamma spectrometer
  • Lamination scintillation type anti-compton gamma spectrometer

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] 1. Probe structure

[0024] An exemplary stack scintillation type inverse Compton gamma spectrometer of the present invention includes a probe, the structure of which is as follows figure 1 shown, including CeBr 3 A crystal scintillator 1 , a BGO crystal scintillator 2 , a photomultiplier tube (PMT) and a charge-sensitive preamplifier 3 , and an aluminum casing 6 for sealing them.

[0025] CaBr 3 The crystal scintillator 1 is used to measure the gamma energy spectrum, and is cylindrical, with a size of φ25.4mm x 25.4mm; one end face is in contact with the shell, and the other end face and side are covered by the BGO crystal scintillator 2 .

[0026] BGO crystal scintillation 2 bodies connected with photomultiplier tube and charge sensitive preamplifier 3 for measurement in CeBr 3 The scintillating photons produced when ...

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Abstract

The invention belongs to the technical field of radiation detection, and relates to a lamination scintillation type anti-compton gamma spectrometer. The lamination scintillation type anti-compton gamma spectrometer comprises a probe. The probe comprises a CeBr3 crystal scintillator, a BGO crystal scintillator, a photomultiplier and a charge-sensitive preamplifier and a shell packaging the parts. The CeBr3 crystal scintillator is used for measuring the gamma spectrum, and other external side parts are wrapped by the BGO crystal scintillator apart from the external side parts contacting the shell. The BGO crystal scintillator is connected with the photomultiplier and the charge-sensitive preamplifier and used for measuring the scintillation photons produced in the CeBr3 crystal scintillatorin case of the compton effect. With application of the lamination scintillation type anti-compton gamma spectrometer, the influence of the compton effect on measurement can be eliminated by only usingone instrument, and the coincidence circuit can be omitted and the instrument complexity and cost can be reduced so that the measurement system is enabled to be simpler, and the carrying convenienceand the use flexibility of the instrument can be increased.

Description

technical field [0001] The invention belongs to the technical field of radiation detection and relates to a laminated scintillation type inverse Compton gamma spectrometer. Background technique [0002] In application scenarios such as nuclear power plant liquid effluent monitoring and radioactive waste analysis, gamma spectroscopy is required. In the process of gamma energy spectrum measurement, some photons will have Compton effect in the sensitive area of ​​the detector, thus increasing the background of the all-energy peak area in the energy spectrum and increasing the lower detection limit of the measurement. Through anti-Compton technology, those events with Compton effect can be identified and removed from the gamma spectrum, thereby reducing the background and lowering the lower limit of detection. [0003] The traditional anti-Compton spectrometer is implemented by two independent detectors, and the main detector is used to measure the gamma energy spectrum. After...

Claims

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Application Information

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IPC IPC(8): G01T1/202G01T1/208
CPCG01T1/202G01T1/208
Inventor 陈立李强韦应靖以恒冠王明亮唐智辉方登富赵佳辉
Owner CHINA INST FOR RADIATION PROTECTION
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