Neutron detector and neutron detection method

Abstract

The invention relates to a neutron detection technology, and discloses a neutron detection cathode, a neutron detector and a neutron detection method. The neutron detection cathode converts neutrons and releases electrons after the incidence of neutrons, and then detects neutron signals indirectly by detecting the electrons. The neutron detection cathode includes a support substrate, an electrodelayer and a neutron capture layer. The electrode layer is arranged on the support substrate. The neutron capture layer is arranged on the other side, opposite to the support substrate, of the electrode layer. The neutron capture layer contains a neutron capture material, and the neutron capture material captures neutrons and then releases electrons. A neutron multiplication detection device further includes a vacuum vessel, a dynode and an anode. The vacuum vessel has an incident window. The electrode layer covers the inner surface of the incident window of the vacuum vessel. The neutron capture layer covers the inner surface of the electrode layer. Thus, accurate multiplication detection or direct detection can be carried out on electrons converted from neutrons through the capture layer,and thermal neutrons can be sensitively detected.

Description

technical field [0001] The present invention generally relates to neutron detection technology, and in particular, relates to a neutron detection cathode capable of converting thermal neutrons into electrons, and a detector composed of a neutron detection cathode capable of multiplying and detecting converted electrons, and a Neutron detection method. Background technique [0002] Different from high-energy charged particles and high-energy photons, neutrons will not have electromagnetic interaction with the detector medium through Coulomb interaction, ionization or excitation of medium atoms; nor will they have photoelectric effect and Compton scattering with the medium, so , neutrons are not easy to be detected directly, and the detection of neutrons is generally realized through nuclear scattering or nuclear reaction with the nuclei of the detector medium. [0003] According to the level of neutron energy, neutrons are classified as follows: neutrons with kinetic energy ...

AI Technical Summary

Problems solved by technology

[0004] Common thermal neutron detectors are generally imaging detectors with high position accuracy, not only has a small effective detection area, but also is expensive, which is not conducive to monitoring large-area background fields with neutron radiation

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