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Multifunctional detector capable of simultaneously measuring alpha, beta, gamma and neutrons

A detector and multi-functional technology, applied in the field of radiation detectors, can solve the problems of large size, detector data cannot be processed together in real time, and high power consumption

Inactive Publication Date: 2020-04-24
中国人民解放军96901部队23分队
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] It is difficult to achieve simultaneous measurement of α, β, γ and neutron rays using traditional detectors. Simultaneous measurement requires the use of αβ detectors, γ detectors, and neutron detectors with three separate functions. The size is relatively large and the power consumption It is also relatively large, and the data of each detector cannot be processed together in real time

Method used

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  • Multifunctional detector capable of simultaneously measuring alpha, beta, gamma and neutrons

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Embodiment Construction

[0013] Such as figure 1 As shown, the detector in this embodiment includes ZnS(Ag) powder 1 , plastic scintillator 2 , CLLB scintillation crystal 3 , silicon photomultiplier tube 4 and signal processing circuit 5 .

[0014] ZnS(Ag) powder 1 is sprayed on the upper surface of the plastic scintillator, the light-emitting surface of the lower surface of the plastic scintillator 2 is polished, and the upper and lower sides of the CLLB scintillator 3 are polished, and the upper and lower sides are transparent glass windows. Silicon photomultiplier tube 4 and CLLB scintillation crystal 3 are coupled and connected by transparent silicone grease. The pulse signal output by the SiPM is processed by the signal processing circuit 5 to identify α, β, γ and neutron ray signals.

[0015] In this way, ZnS(Ag) detects α particles, and its main luminescent component is composed of a fast component with a luminous time constant of about 100ns and a slow component of about 2us. 4. The pulse cu...

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Abstract

The invention discloses a multifunctional detector capable of simultaneously measuring alpha, beta, gamma and neutrons. A plastic scintillator sprayed with zinc sulfide (ZnS (Ag)) and scintillation crystals with gamma and neutron detection and discrimination capability such as Cs2LiLaBr6: Ce (CLLB), Cs2LiYCl6: Ce (CLYC) and Cs2LiLa (Br, Cl) 6: Ce (CLLBC) are coupled together to form a coincidencecrystal, and a silicon photomultiplier is coupled with the coincidence crystal to form the detector. Alpha, beta, gamma and neutron rays are discriminated by using a pulse shape discrimination (PSD) method, and the interference of gamma rays on alpha and beta detectors can be greatly reduced by using a digital anticoincidence technology.

Description

technical field [0001] The invention relates to a radiation detection device, in particular to a detector element, and belongs to the field of radiation detectors. Background technique [0002] The traditional αβ detector is to spray zinc sulfide (ZnS(Ag)) powder on the surface of the plastic scintillator, when charged particles such as α particles are incident on the ZnS(Ag), they emit scintillation fluorescence, and the incident β rays will interact with the plastic scintillator. To generate another kind of scintillation fluorescence, a photomultiplier tube is used to couple to the back of the plastic scintillator, and the fluorescence generated by the two kinds of αβ particles is converted into pulse signals with two time constants through the photomultiplier tube. [0003] Traditional neutron detectors use 3 He tube or containing 6 Li scintillators (Li glass, CLYC, CLLB, CLLBC) coupled to photomultiplier tubes. [0004] It is difficult to use traditional detectors to ...

Claims

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Application Information

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IPC IPC(8): G01T1/202G01T1/203G01T1/24G01T3/06G01T3/08
CPCG01T1/202G01T1/203G01T1/248G01T3/06G01T3/08
Inventor 程金星温伟伟吴友朋王庆波
Owner 中国人民解放军96901部队23分队
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