Miniaturized composite gamma spectrometer

A gamma spectrometer and composite technology, applied in the field of miniaturized composite gamma spectrometer, can solve problems such as nuclide identification difficulties and interference, improve the ability to distinguish, meet the requirements of radiation measurement, and facilitate the identification of nuclide types Effect

Active Publication Date: 2021-05-07
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

For occasions with multiple radionuclides, the Compton events of high-energy γ-rays will interfere with the full-energy peak events of low-energy γ-rays, which brings great difficulties to the identification of nuclides

Method used

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  • Miniaturized composite gamma spectrometer
  • Miniaturized composite gamma spectrometer
  • Miniaturized composite gamma spectrometer

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Embodiment Construction

[0027] In order to make the content of the technical solution of the present invention clearer, a specific implementation example will be described in detail below with reference to the accompanying drawings.

[0028] Utilize a kind of gamma spectrometer design scheme structure of concrete design of the present invention such as figure 1 shown. In this implementation case, the semiconductor detection unit adopts a small-volume cadmium-zinc-telluride (CZT) semiconductor detector that can achieve high energy resolution at room temperature, and its anode and cathode signals are drawn out through a pin and directly connected to the readout circuit. The scintillation crystal is BGO crystal with the advantages of low radioactivity, high density, and easy processing, and uses a photomultiplier tube (PMT) for photoelectric conversion. The outer diameter of the cup-shaped BGO crystal is equivalent to the diameter of the PMT, and the two are coupled together. Encapsulated with an alumi...

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Abstract

The invention discloses a miniaturized composite gamma spectrometer. The spectrometer specifically comprises a semiconductor detection unit, a scintillation crystal, a photoelectric conversion device and a reading circuit. The innovation point is that a high-energy-resolution room-temperature semiconductor gamma detector is compactly arranged in a small-size cavity of a cup-shaped inorganic scintillation crystal, and the advantages of high detection efficiency of the inorganic scintillation crystal and high energy resolution of a semiconductor detector are integrated, so the spectrometer has the functions of low background gamma counting and high-resolution anti-Compton gamma-ray energy spectrum measurement, and can better meet the use requirements under different conditions. According to the technical scheme, gamma radiation detection in a wide dose rate range can be realized, refrigeration is not needed, a miniaturized and lightweight portable probe is easy to design, and a traditional high-purity germanium detector with an anti-Compton function can be replaced in part of application fields; and the spectrometer has a wide application prospect in the aspects of environmental radiation monitoring, radionuclide identification and the like.

Description

technical field [0001] The invention belongs to the technical field of radiation detection, and in particular relates to a miniaturized compound gamma spectrometer. Background technique [0002] At present, domestic research on compound gamma spectrometers mainly includes: "A Wide-Energy Anti-Compton Anti-Cosmic Ray High-Purity Germanium Spectrometer" by Qiu Yuanfa of Nanjing Nuclear Security Nuclear Energy Technology Co., Ltd. (Patent No.: CN208110056U), "Anti-coincidence ultra-low background HPGe gamma spectrometer" (Patent No.: CN108287362A) by Chang Junlin of Cardinal Technology (Beijing) Co., Ltd., "A high-efficiency "Preliminary Development of Compact Anti-Compton Spectrometer" (NUCLEAR TECHNIQUES), "Development of Axisymmetric BGO Anti-Compton Shielded Detector" (Nuclear Electronics & Detection Technology) by Lei Xiangguo, Institute of Modern Physics, Chinese Academy of Sciences, etc., among which The anti-Compton spectrometer designed with a high-purity germanium de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36
CPCG01T1/362Y02E30/30
Inventor 封常青王轶超曹平王德毅曹喆安琪
Owner UNIV OF SCI & TECH OF CHINA
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