An entrance window surrounded phoswich design for efficient large-angle Compton-suppressed and low-background GAGG: Ce detector

被引：1

作者：

Wang, H. D. ^{[1
]}

Lu, Jing-Bin ^{[1
]}

Li, R. P. ^{[1
]}

Gao, T. J. ^{[1
]}

Li, Chengqian ^{[1
]}

Qu, Huan ^{[1
]}

Zhu, Li-Hua ^{[2
]}

Li, Cong-Bo ^{[3
]}

Zheng, Yun ^{[3
]}

机构：

[1] Jilin Univ, Coll Phys, Changchun 130012, Jilin, Peoples R China

[2] Beihang Univ, Sch Phys, Beijing 100191, Peoples R China

[3] China Inst Atom Energy, Beijing 102413, Peoples R China

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2023年 / 1055卷

关键词：

Phoswich design; Geant4; simulation; Large angle; Compton suppression; Low background;

D O I：

10.1016/j.nima.2023.168542

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

An entrance window surrounded phoswich design of GAGG:Ce/CsI:Tl has been implemented for a low -background and Compton-suppressed detector. Not as the common phoswich detector does, the GAGG:Ce scintillator with the well-type CsI:Tl scintillator entrance window surrounded makes the efficient large -angle Compton suppression. This design also makes results measured by the phoswich detector have no degradation compared with the single GAGG:Ce detector. The Compton continuum and other backgrounds are reduced by identifying the gamma-ray energy depositions in different scintillators using the real-time rise time discrimination (RTD) method. The background rate is suppressed approximately 74%. The peak-to-total (P/T) ratio at 137Cs and 60Co point sources are 0.769 and 0.561, respectively. The Compton suppression is highly efficient at all the energy range of Compton continuums. The reduction of the Compton continuum and other backgrounds and the improvement of the P/T ratio will greatly expand the application range of the GAGG:Ce detector in low-intensity measurements.

引用

页数：5