Device and method for [gamma] and neutron double ray power spectrum measurement

Abstract

The invention discloses a device and a method for [gamma] and neutron double ray power spectrum measurement. The [gamma]-ray signal and the neutron signal are distinguished by particle discrimination by using the feature of a scintillation crystal being sensitive to the [gamma]-ray and the neutron at the same time. The pulse amplitudes of the two signals are analyzed respectively to obtain the [gamma]-ray deposition spectrum and the neutron deposition spectrum. The [gamma]-ray has a peak response in the scintillation crystal, and the [gamma]-ray spectrum is the measured [gamma]-ray power spectrum. The neutron is continuously responsive in the scintillation crystal. The neutron power spectrum is solved by the least squares of the response matrix and the neutron deposition spectrum of a single energy neutron. Finally, by analyzing the energy spectrum data, the key nuclide is identified and the content thereof is calculated, and the [gamma] dose and the neutron dose are calculated. The portability of the instrument for mixed radiation field measurement is effectively improved and the mutual interference between the [gamma]-ray and the neutron is avoided.

Description

technical field [0001] The invention relates to an energy spectrum measuring device and a measuring method, in particular to a gamma and neutron double-ray energy spectrum measuring device and a measuring method. Background technique [0002] Gamma-rays and neutrons are the most common and important natural or artificial rays in the radiation field. Measuring the energy spectrum of gamma-rays and neutrons in the mixed radiation field is the key to mastering the radiation environment information. At present, the gamma energy spectrum is mainly measured by detectors with energy resolution capability, while the neutron energy spectrum is obtained indirectly by time-of-flight method, moderation method and scattered proton method. [0003] Since the traditional energy spectrometer can only measure a single ray, two or more energy spectrometers are needed to obtain the gamma-ray and neutron energy spectrum of the mixed radiation field, which poses challenges to the portability and...

AI Technical Summary

Problems solved by technology

[0003] Since the traditional energy spectrometer can only measure a single ray, two or more energy spectrometers are needed to obtain the gamma-ray and neutron energy spectrum of the mixed radiation field, which poses challenges to the portability and power consumption of field measurements; At the same time, since γ-rays and neutrons are not charged, for a single-ray energy spectrometer that does not have the ability to discriminate particles, the two types of rays in the mixed radiation field even interfere with each other

Therefore, this single energy spectrometer cannot simultaneously measure gamma rays and neutrons in a mixed radiation field; and when it does not have the ability to discriminate particles, the mutual interference between the two cannot be avoided

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