Continuous neutron spectrum real-time detection system

Abstract

A continuous neutron spectrum real-time detection system comprises a plurality of spherical-shell polyethylene moderation layers, a plurality of spherical-shell thermal-neutron detector systems, an electronics system, a computer system, an input power supply interface, a signal output interface, a display panel and a switch; and after neutrons with different energies enter the detection system, the neutrons are moderated by different moderation layers to thermal neutrons to be finally detected by the detector system of one layer, a pulse signal is transmitted to the electronics system, the electronics system analyzes and outputs relevant signals according to signals inputted by different detection layers, finally the computer system outputs a corresponding energy value according to different signals outputted by the electronics system and draws and records an energy spectrum. The continuous neutron spectrum real-time detection system is small in size and capable of precisely measuring neutron energy spectrum on one position.

Description

technical field [0001] The invention relates to a continuous neutron energy spectrum real-time detection system which can be used for neutron measurement in experimental sites and environments. Background technique [0002] With the development of neutron physics, aerospace, reactor, accelerator technology, radiation protection and environmental protection, the real-time measurement of neutron spectrum is particularly important. [0003] Neutrons are neutral and uncharged, and cannot directly cause ionization of matter when passing through matter, so they cannot be directly detected. The measurement of neutrons is carried out indirectly through the charged particles produced by its interaction with other nucleons. Generally, there are four methods: nuclear reaction method, nuclear recoil method, nuclear fission method and activation method. When using the nuclear reaction method to measure neutrons, select 3 He is used as a detection gas because 3 He reacts with thermal n...

AI Technical Summary

Problems solved by technology

The disadvantage of the Bonner multi-sphere system is: the Bonner multi-sphere system detector system (the number of balls) is large, and the whole set of multi-sphere system is relatively large, and it is very inconvenient to measure the sub-spectrum in the outdoor environment.

And because the Bonner multi-sphere system is composed of multiple spheres, and each sphere has a large volume, the detectors need to be arranged apart when performing real-time measurement, and this will make the distance between the detectors relatively long, thus neutron radiation The exact neutron energy spectrum of the same point cannot be obtained in places with large field changes

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