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

A measuring device and dual-ray technology, applied in X-ray energy spectrum distribution measurement, measuring device, X/γ/cosmic radiation measurement, etc., can solve the mutual interference of rays, mutual interference cannot be avoided, and simultaneous measurement of γ-ray and neutral Problems such as sons and daughters to achieve the effect of solving mutual interference and ensuring portability

Pending Publication Date: 2017-07-28
CHENGDU UNIVERSITY OF TECHNOLOGY +2
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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 spectromet

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

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Embodiment 1

[0031] Embodiment 1: see figure 1 and figure 2 , a gamma, neutron dual-ray energy spectrum measuring device, comprising a detector 1, a signal acquisition and processing system 2 and a data processing system 3 arranged in sequence;

[0032] Described detector 1 is scintillation crystal 11 detector 1, and its scintillation crystal 11 is CLYC (Cs 2 LiYCl 6 :C);

[0033] The signal acquisition and processing system 2 includes an ADC digital waveform sampling circuit 21, a pulse shape discrimination module 22 and a dual-channel pulse shaping-amplitude discrimination-amplitude analysis module 23 arranged in sequence, wherein the pulse shape discrimination module 22: according to gamma rays and neutral Differentiate the gamma signal from the neutron signal due to the waveform change caused by the difference in the luminescent composition of the electrons in the detector 1; the dual-channel pulse shaping-amplitude discrimination-amplitude analysis module 23: separate the gamma si...

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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...

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Application Information

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IPC IPC(8): G01T1/36G01T3/06
CPCG01T1/362G01T3/06
Inventor 庹先国王琦标杨剑波成毅李怀良王洪辉邓超
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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