Stacking type scintillator detector capable of simultaneously measuring beta and gamma power spectrums

Abstract

The invention relates to a stacking type scintillator detector capable of simultaneously measuring beta and gamma power spectrums. The stacking type scintillator detector has a housing with one end opened and an aluminized polyester film for sealing the opening; three layers of scintillation crystal structures and a photoelectric multiplication module are arranged in the aluminized polyester film; the photoelectric multiplication module collects scintillation photons generated by the three layers of the scintillation crystal structures and generates signals. A method for simultaneously measuring beta and gamma power spectrums performs identification on seven types of situations through analyzing a shape of an anode output pulse of a photoelectric multiplier tube in the photoelectric multiplication module, extracts characteristic quantities, determines whether a waveform generated by specific crystal is contained in the pulse and finally realizes discrimination on types of particles. The stacking type scintillator detector of the invention can realize type screening on beta and gamma particles in an energy range from 100keV-3.5MeV, and can respectively obtain a beta power spectrum and a gammapower spectrum in a mixed field through one time measurement and has significance to radiation source identification and radiation protection measurement design in the mixed field.

Description

technical field [0001] The invention relates to a stacked scintillator detector capable of simultaneously measuring beta and gamma energy spectra, and belongs to the technical fields of beta energy spectrum measurement, gamma energy spectrum measurement and mixed radiation field particle screening. Background technique [0002] In nuclear facilities, there are often multiple types of radiation particles (β, γ, n, etc.) at the same time; since the β decay of radionuclides is often accompanied by the emission of γ rays, the β, γ mixed radiation field is a very Common mixed field. The penetration ability of β rays with the same energy is far less than that of γ rays, so it is necessary to measure the β and γ energy spectrum information in the mixed field separately in order to take reasonable protective measures. [0003] In order to separately obtain the β energy spectrum and γ energy spectrum in the mixed field, the key and difficult point is to realize the discrimination of...

AI Technical Summary

Problems solved by technology

The two-time measurement method has many disadvantages: the measurement time is long, and the staff will receive twice the dose; the requirements for the stability of the radiation field are high; the shielding block installed during the second measurement will change the response of the detector to γ, and the accuracy of the measurement results inferior

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