Modelling of a Single-Channel Beta-Gamma Coincidence Phoswich Detector Using Geant4 for the Conversion Electron Energy Peak Resolution and Beta-Gamma Coincidence Efficiency Improvement

被引：3

作者：

Zhang, Weihua ^{[1
]}

Mekarski, Pawel ^{[1
]}

Bean, Marc ^{[1
]}

Yi, Jing ^{[1
]}

Ungar, Kurt ^{[1
]}

机构：

[1] Radiat Protect Bur Hlth Canada, Ottawa, ON K1A 1C1, Canada

来源：

PURE AND APPLIED GEOPHYSICS | 2014年 / 171卷 / 3-5期

关键词：

Phoswich detector design; Monte Carlo simulation; FWHM; xenon radioisotopes; RADIOACTIVE XENON; SYSTEM;

D O I：

10.1007/s00024-012-0494-4

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

In this study, an optimized single-channel phoswich well detector design has been proposed and assessed in order to improve beta-gamma coincidence measurement sensitivity of xenon radioisotopes. This newly designed phoswich well detector consists of a plastic beta counting cell (BC404) embedded in a CsI (Tl) crystal coupled to a photomultiplier tube. The BC404 is configured in a cylindrical pipe shape to minimise light collection deterioration. The CsI (Tl) crystal consists of a rectangular part and a semi-cylinder scintillation part as a light reflector to increase light gathering. Compared with a PhosWatch detector, the final optimized detector geometry showed 15 % improvement in the energy resolution of a Xe-131m 129.4 keV conversion electron peak. The predicted beta-gamma coincidence efficiencies of xenon radioisotopes have also been improved accordingly.

引用

页码：621 / 627

页数：7

共 11 条

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