Gas scintillation based fission neutron detector

A fission neutron and gas scintillation technology, which is applied in scintillation detector measurement and other directions, can solve the problems of low neutron sensitivity and neutron/gamma resolution, and achieve flat energy spectrum response, neutron/gamma The effect of horse resolution and fast time response

Inactive Publication Date: 2010-04-28
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0005] The object of the present invention is to provide a fission neutron detector based on gas scintillation that can have the advantages of other detectors in the low-intensity pulsed neutron / gamma mixed radiation field, which solves the problem of neutron / gamma neutron detectors in existing neutron detectors. Technical problems of low gamma resolution and low neutron sensitivity

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  • Gas scintillation based fission neutron detector
  • Gas scintillation based fission neutron detector

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Embodiment Construction

[0028] Such as figure 1 and figure 2 As shown, the gas scintillator-based fission neutron detector of the present invention includes a detector barrel 1, an incident window 31 sealed and arranged on the front end of the detector barrel 1, and an exit window 31 sealed and arranged on the rear end of the detector barrel 1. Window 32, two quartz windows 5 arranged on both sides of the detector barrel 1, at least two target frames 6 fixed in the detector barrel 1, and fission targets 7 suspended on the corresponding target frames 6 are respectively arranged Two photodetectors 20 outside the two quartz windows 5, an inflator 8 connected to the detector barrel 1, and scintillation gas 4 filled inside the barrel core; the incident window 31 and the exit window 32 at the front and rear ends of the barrel 1 It is a nickel plate with a thickness of 0.4mm; the scintillation gas 4 is inert gas or nitrogen; the detector cylinder 1 is made of stainless steel, and its length is 300mm, widt...

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Abstract

The invention relates to a gas scintillation based fission neutron detector. The detector comprises a detector barrel, an entrance window hermetically arranged at the front end face of the detector barrel, an exit window hermetically arranged at the rear end face of the detector barrel, two quartz windows arranged at two lateral surfaces of the detector barrel, at least two target stands fixed in the detector barrel, fission targets suspended on the corresponding target stands, two photoelectric detectors arranged outside the two quartz windows respectively, a charging tool communicated with the detector barrel, and scintillation gas filled in a barrel core; and the scintillation gas adopts inert gas or nitrogen. The gas scintillation based fission neutron detector solves the technical problems of low neutron/gamma resolving power and low neutron sensitivity in the conventional neutron detector, and has the advantages of smooth fast neutron energy response and quick time response.

Description

technical field [0001] The invention relates to a fission neutron detector for measuring neutron fluence rate in a low-intensity pulsed neutron / gamma mixed radiation field, in particular to a principle of using fragments produced by neutron-induced fission materials to excite gas to emit light In order to realize the detector of neutron detection. Background technique [0002] The low-intensity pulsed neutron / gamma mixed radiation field has the following characteristics: low neutron intensity, wide range of neutron energy distribution, the radiation intensity of gamma rays is at the same level as the neutron intensity, and the pulse duration is on the order of microseconds. Therefore, it is difficult to measure the neutron fluence rate in such a pulsed radiation field, and neutron detectors are required to have high neutron sensitivity, flat energy spectrum response, fast time response and high neutron sub / gamma resolution. [0003] Scintillation film detectors and scintil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T3/06
Inventor 张小东邱孟通张建福李宏云
Owner NORTHWEST INST OF NUCLEAR TECH
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