Digital neutron spectrometer response matrix obtaining method

Abstract

The invention relates to a digital neutron spectrometer response matrix obtaining method. The method includes the following steps that: the response function of monoenergetic neutrons of a digital neutron spectrometer at an experimental energy point can be obtained through the experimental calibrations of the monoenergetic neutrons; an equation solution module is established, and a high-order inhomogeneous equation residual least square method is adopted to get solutions; relevant parameters of the response function of the neutron spectrometer can be obtained based on the combination of the above two steps, namely, luminosity factors, zero track positions and energy per-channel; a response matrix calculation module is established; and a complete response matrix of neutrons to be measured is obtained. With the response matrix obtaining method adopted, a parameter adjusting process in response matrix obtaining can be simplified, and time cost for obtaining the response function can be deceased, and the calculation accuracy of the response function can be improved, and intelligent operation can be realized.

Description

technical field [0001] The invention belongs to the field of radioactive material detection, and in particular relates to a method for obtaining a response matrix of a digital neutron spectrometer. Background technique [0002] The liquid scintillator detector is a kind of organic scintillator detector. For the organic scintillator, its advantage is that the density of hydrogen is high, so the neutron detection efficiency is high, and the time response is fast. In addition, because of their good particle discrimination performance, they are widely used in fast neutron detection. The following is a brief introduction to the development history of liquid scintillators. [0003] The measurement principle of using organic liquid scintillation detectors to measure neutron energy spectrum is: when the incident neutrons and H nuclei are elastically scattered, the direction of movement of neutrons changes and the energy decreases, and the reduced energy of neutrons is transferred t...

AI Technical Summary

Problems solved by technology

[0010] The main disadvantages of this method of obtaining the response function are: 1. The NRESP7 program simulates the luminescence process is hidden from the user, and the user cannot calculate the response function for some special structure detectors

2. The NRESP7 program cannot consider that the final number of electrons produced by liquid flash has a statistical random distribution

[0011] 3. The theoretical calculation spectrum does not consider the zero trace correction of the experimental spectrum

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