Anti-compton and anti-universe ray high-purity germanium spectrometer

Abstract

The invention discloses an anti-compton and anti-universe ray high-purity germanium spectrometer, which comprises a lead shielded room, a main detector, an annular anticoincidence detector and a top detector, wherein the main detector, the annular anticoincidence detector and the top detector are arranged in the lead shielded room; the top detector is located at the upper part of the annular anticoincidence detector; a hollow cavity is arranged in the middle of the annular anticoincidence detector; a first hollow cavity for installing the main detector is formed in the lower part of the hollow cavity; and a second hollow cavity for containing a to-be-detected sample is formed in the upper part of the hollow cavity. According to the anti-compton and anti-universe ray high-purity germanium spectrometer, the anti-compton scattering and anti-universe ray functions are achieved at the same time, the radioactive measurement accuracy is further improved, and the lower detection limit is reduced to the maximal extent.

Description

technical field [0001] The invention relates to the technical field of radioactivity measurement, in particular to an anti-Compton anti-cosmic ray high-purity germanium spectrometer. Background technique [0002] When the γ-ray energy is within the energy range of tens of KeV to MeV, in the energy spectrum measured by semiconductor detectors and scintillation crystal detectors, the area of ​​the Compton plateau is often relatively large, which adds difficulties to the analysis of complex spectra. The all-energy peak of the lower-energy gamma-ray is superimposed on the Compton plateau of the high-energy gamma energy spectrum. Due to the statistical fluctuation of counts on the plateau, the accuracy of the area measurement of the all-energy peak of the low-energy gamma-ray is greatly affected, or it may not be possible at all. The all-energy peak of low-energy gamma rays cannot be found. The background level of radioactivity measurement directly affects its detection limit, c...

AI Technical Summary

Problems solved by technology

[0002] When the gamma ray energy is within the energy range of tens of KeV to MeV, in the energy spectrum measured by semiconductor detectors and scintillation crystal detectors, the area of ​​the Compton plateau is often relatively large, which adds difficulties to the analysis of complex spectra

The all-energy peak of the lower-energy gamma-ray is superimposed on the Compton plateau of the high-energy gamma energy spectrum. Due to the statistical fluctuation of counts on the plateau, the accuracy of the area measurement of the all-energy peak of the low-energy gamma-ray is greatly affected, or it may not be possible at all. The omnipotent peak of low-energy gamma rays cannot be found

Images