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Portable gamma spectroradiometer

A gamma radiation, portable technology, applied in the field of portable gamma radiation spectrometer, can solve the problems of low detector efficiency, low dose value accuracy, single energy spectrum analysis method, etc., and achieve light weight, portable use, small size effect

Inactive Publication Date: 2015-05-20
IMDETEK
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the portable gamma radiation spectrometer in the prior art uses a single CZT detector and a single energy spectrum analysis method, resulting in low detector efficiency and low accuracy of the final dose value

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Embodiment Construction

[0030] As a ternary solid solution compound semiconductor material with excellent photoelectric properties, CZT has a high average atomic number, a large forbidden band width (Eg is about 1.57eV at room temperature), and a high resistivity (ρ >1010Ω·cm), excellent carrier transport characteristics (electron mobility μe>1000cm2 / V·s, lifetime τe>10-5s), low leakage current and noise during operation, etc. It is an ideal material for detectors. At present, X-ray and gamma-ray detectors made of CZT crystals have been widely used in environmental monitoring, nuclear medicine, industrial non-destructive testing, safety inspection, nuclear weapon penetration, aerospace, astrophysics and high-energy physics. And other fields, it has become an upgraded product to replace the traditional Si, Ge and scintillator detectors.

[0031] The present invention is based on two superimposed single-layer CZT detectors 1 and adopts a multi-energy section energy analysis method to prepare a portable...

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Abstract

The invention belongs to the technical field of radioactive detection instruments, and specifically provides a portable gamma spectroradiometer. The portable gamma spectroradiometer comprises a power supply system (4), a detector system (5) and a signal processing system (6), wherein the detector system (5) comprises two single-layer CZT detectors (1) which are laminated together up and down; the electric signals of the two single-layer CZT detectors (1) are connected into the signal processing system (6) after being connected in parallel; the power supply system (4) is connected with the detector system (5) and is used for supplying power for a laminated CZT detector consisting of the two single-layer CZT detectors (1). The portable gamma spectroradiometer overcomes the problems that the efficiency of a single detector is not high and the precision of a final dosage value is not high caused by the fact that a portable gamma spectroradiometer in the prior art uses the single CZT detector in a single energy spectrum analysis manner.

Description

technical field [0001] The invention belongs to the technical field of radiation detection instruments, and in particular relates to a portable gamma radiation spectrometer. Background technique [0002] Restricted by factors such as industry development and foreign nuclear-related technology restrictions, domestic spectrometer technology has not developed significantly in the past 20 years, and there is a big gap with foreign countries. So far, there is no mature digital multi-channel spectrometer or portable spectrometer that is widely accepted by the market. Gamma dosimeter products launched. [0003] In recent years, various foreign spectrometer manufacturers have launched a variety of digital portable spectrometers based on CZT detectors, mainly including the Interceptor spectral personal radiation detection system jointly launched by Thermo Company and Target Instrument Company, microRaider developed by ICX Company, Lawrence A pocket spectrometer developed by Berkeley...

Claims

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Application Information

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IPC IPC(8): G01T1/36
Inventor 王淑琼徐亚东王涛查钢强折生阳介万奇李阳盛丽娜贺亚鹏吕淑丽
Owner IMDETEK
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