Spherical multilayer polyethylene moderation body and neutron energy spectrum and fluence measurement device of single probe

Abstract

The invention discloses a spherical multilayer polyethylene moderation body, which is formed by accumulating a plurality of spherical polyethylene moderation bodies with different inner diameters layer by layer from inside to outside, wherein the inner diameter of the first spherical polyethylene moderation body is equal to the diameter of a spherical neutron detector 1, and the inner diameter of ith spherical multilayer polyethylene moderation body is equal to the outer diameter of the (i-1)th ball, wherein i is equal to 2, 3, 4 and so on. A neutron energy spectrum and fluence measurement device of a single probe comprises the spherical multilayer polyethylene moderation body, the spherical neutron detectors, a nuclear electronics circuit, a high and low voltage circuit, and a single chip. The spherical polyethylene moderation body can moderate the neutron, so that the neutron after being moderated can be detected by the neutron detectors. The nuclear electronics circuit can amplify the signals detected by the spherical neutron detectors and can implement n-Gamma screening. The single chip can process the signals and can display final result. The spherical multilayer polyethylene moderation body has the advantage of good consistency. The neutron energy spectrum and fluence information can be obtained by using the device disclosed by the invention.

Description

technical field [0001] The invention relates to a multilayer spherical polyethylene moderator and a neutron energy spectrum and fluence measuring device, in particular to a single-probe neutron energy spectrum and fluence measuring device, which belongs to nuclear physics, nuclear technology and applications, etc. field. Background technique [0002] Neutron time-of-flight spectrometer, recoil proton method, nuclear reaction type measurement, etc. are commonly used neutron spectrum measurement methods. In the field of radiation protection, although the resolution is not high, due to the energy range of the measured neutron spectrum At present, the only neutron spectrometer for radiation protection with mature technology is the multi-sphere neutron spectrometer. [0003] The multi-sphere neutron spectrometer is composed of multiple neutron detectors with spherical polyethylene moderators of different diameters, and each neutron detector is composed of a polyethylene spherica...

AI Technical Summary

Problems solved by technology

[0008] The technical problem of the present invention is to solve the problem of consistency between detectors and single function in existing Bonner spectrometers, and provide a spherical polyethylene moderator with good consistency and capable of measuring energy spectrum and fluence Bulk and single-probe neutron measurement device

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