Development of a low background alpha-beta/gamma coincidence detector

被引：10
作者：
Baccolo, G. [2 ,3 ]
Barresi, A. [1 ,2 ]
Beretta, M. [1 ,2 ,4 ]
Chiesa, D. [1 ,2 ]
Nastasi, M. [1 ,2 ]
Previtali, E. [1 ,2 ]
Sisti, M. [1 ,2 ]
机构：
[1] Univ Milano Bicocca, Dept Phys, I-20126 Milan, Italy
[2] INFN, I-20126 Milan, Italy
[3] Univ Milano Bicocca, Environm & Earth Sci Dept, I-20126 Milan, Italy
[4] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2021年 / 1003卷
关键词：
Low background gamma ray spectroscopy; Coincidence measurements; Pulse shape discrimination; Liquid scintillator; HPGe detector; PULSE-SHAPE DISCRIMINATION; LIQUID;
D O I：
10.1016/j.nima.2021.165290
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Developing detectors operating in time coincidence is a possible way to increase the sensitivity in gamma spectroscopy. Such design allows both the selection of specific events and the rejection of background. In this work we present a new low background detector mainly developed for the determination of radioactive contamination of liquid samples. The system was constructed by combining a liquid organic scintillator, for the detection of alpha and beta particles, and a High Purity Germanium for the detection of correlated gamma rays. Despite being located in a non-underground laboratory, the instrument can reach sensitivities in the range of tens mBq/kg for U-238, U-235 and Th-232, exploiting alpha-gamma and beta-gamma coincidence events.
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页数：6
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