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Neutron spectrum measuring device and method

A measurement device and neutron technology, applied in the field of neutron spectrum measurement, can solve the problems of large space occupation and high cost, and achieve the effect of convenient device manufacturing, low cost and guaranteed accuracy

Inactive Publication Date: 2020-07-14
SICHUAN UNIV
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Problems solved by technology

On the other hand, the greater the number of moderating spheres containing the neutron detectors, the more expensive and space-consuming the Bonner multisphere neutron spectrometer

Method used

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  • Neutron spectrum measuring device and method

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Embodiment Construction

[0032] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0033] Such as figure 1 As shown, the neutron energy spectrum measurement device includes a neutron moderator chamber 3, a tubular housing 2 is arranged in the neutron moderator chamber 3, the upper end of the housing 2 is open, and the upper end of the housing 2 extends out of the neutron moderator. The top of the chemical chamber 3 and the bottom of the housing 2 are sealed, and the housing 2 is provided with a cylindrica...

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Abstract

The neutron energy spectrum measuring device comprises a neutron moderation cavity, a tubular shell is arranged in the neutron moderation cavity, an opening is formed in the upper end of the shell, the upper end of the shell extends out of the top of the neutron moderation cavity, the bottom of the shell is sealed, and a cylindrical thermal neutron detector is arranged in the shell; a pressure sensor is arranged at the bottom of the neutron moderation cavity; a moderating liquid storage cavity is arranged below the neutron moderating cavity, the moderating liquid storage cavity is communicatedwith the neutron moderating cavity through a pipeline, and a two-way water pump is arranged on the pipeline. The neutron energy spectrum measurement method comprises the steps of device parallelism adjustment, moderating liquid injection, neutron measurement, neutron energy spectrum unfolding and the like. Via the neutron energy spectrum measuring device, the manufacturing difficulty and the manufacturing cost of a neutron energy spectrometer based on the same physical principle are reduced; the device is flexible in measurement mode, convenient to use, small in occupied space and high in measurement result accuracy.

Description

technical field [0001] The invention relates to the technical field of neutron spectrum measurement, in particular to a neutron energy spectrum measurement device and method. Background technique [0002] Neutron energy spectrum measurement plays an important role in basic neutron physics research, neutron application fields, and radiation protection fields. For example, measuring the neutron energy spectrum generated by nuclear reactions can obtain nuclear energy level information. The energy spectrum can accurately calculate the corresponding surrounding dose equivalent. Because neutrons are neutral, they cannot directly ionize matter atoms, so neutrons are usually not directly detectable. At present, the detection of neutrons is usually realized by recording the secondary charged particles produced by the interaction between neutrons and other nucleons, mainly including four neutron detection methods: nuclear reaction method, nuclear recoil method, nuclear fission method...

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Application Information

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IPC IPC(8): G01T3/00
CPCG01T3/008
Inventor 陈秀莲覃雪刘军周荣梁勇飞杨朝文
Owner SICHUAN UNIV
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