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Thermal neutron reference radiation device with double radiation fields

A technology that refers to radiation and thermal neutrons, applied in the direction of radiation measurement, instruments, etc., can solve the problem of poor uniformity of the radiation field and achieve the effect of improving uniformity

Inactive Publication Date: 2022-03-01
NAT INST OF METROLOGY CHINA
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  • Abstract
  • Description
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Problems solved by technology

[0003] An embodiment of the present invention provides a thermal neutron reference radiation device with dual radiation fields, aiming to solve the problem of poor uniformity of the radiation field in the existing reference radiation device

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  • Thermal neutron reference radiation device with double radiation fields
  • Thermal neutron reference radiation device with double radiation fields
  • Thermal neutron reference radiation device with double radiation fields

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only for explaining the present invention, and are not intended to limit the present invention.

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] combined with figure 1 , an embodiment of the present invention provides a dual radiation field thermal neutron reference radiation device, comprising: a first protective layer 1, a second protective layer 2, a neutron source plate 3, a first moderator layer 4, a first leveling layer Lens 5 , first radiation field 6 , first reflection layer 7 , second moderator layer 8 , second leveling lens 9 , second radiation field 10 and second reflection layer 11 .

[...

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Abstract

The invention belongs to the technical field of neutron physics and neutron application, and provides a thermal neutron reference radiation device with double radiation fields. The thermal neutron reference radiation device with the double radiation fields comprises a first protection layer, a second protection layer, a neutron source plate, a first slowing-down layer, a first flattening lens, a first radiation field, a first reflection layer, a second slowing-down layer, a second flattening lens, a second radiation field and a second reflection layer. On one hand, fast neutrons released by a neutron source plate sequentially pass through a first moderation layer, a first flattening lens and a first reflecting layer, and finally a first radiation field with uniform thermal neutron flux and high thermal neutron fluence rate is obtained; on the other hand, fast neutrons released by the neutron source plate sequentially pass through the second moderation layer, the second flattening lens and the second reflecting layer, and finally a second radiation field with uniform thermal neutron flux and high thermal neutron proportion is obtained.

Description

technical field [0001] The invention belongs to the technical field of neutron physics and neutron application, in particular to a thermal neutron reference radiation device with dual radiation fields. Background technique [0002] The thermal neutron reference radiation device with dual radiation fields is a kind of device capable of generating thermal neutron reference radiation, which is used for metrology work and other research work related to thermal neutrons, mainly including: developing thermal neutron detectors or thermal neutron Technologies such as neutron imaging provide an experimental platform. The thermal neutron reference radiation device with double radiation field is composed of radionuclide neutron source, moderator material and radiation protection material. The construction method is to embed the radionuclide neutron source into the moderator material, and the fast neutrons produced by the radionuclide neutrons become thermal neutrons through proper mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00
CPCG01T7/005
Inventor 张健任忠国张辉王平全杨竣凯
Owner NAT INST OF METROLOGY CHINA
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