GEANT4 simulation of photo-peak efficiency of small high purity germanium detectors for nuclear power plant applications

被引：10

作者：

Rehman, Shakeel Ur ^{[1
]}

Mirza, Sikander M. ^{[1
]}

Mirza, Nasir M. ^{[1
]}

Siddique, Muhammad Tariq ^{[1
]}

机构：

[1] Pakistan Inst Engn & Appl Sci, Dept Phys & Appl Math, Islamabad 45650, Pakistan

来源：

ANNALS OF NUCLEAR ENERGY | 2011年 / 38卷 / 01期

关键词：

GEANT4; High purity germanium; Photo-peak efficiency; Gamma spectroscopy; MONTE-CARLO CALCULATIONS; HPGE-DETECTOR; CALIBRATION; POINT; CODE;

D O I：

10.1016/j.anucene.2010.08.010

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

GEANT4 - based Monte Carlo simulations have been carried out for the determination of photo-peak efficiency of heavily shielded small high purity germanium detector (HPGe) used for monitoring radiation levels in nuclear power plants The GEANT4 simulated values of HPGe detector efficiency for point as well as for disk sources for two different values of collimator diameter have been found in good agreement with the corresponding published results obtained by using the MCNP code The work has been extended to study the effect of radial displacement of a source relative to a detector on photo-peak efficiency for both point and disk source and at various values of gamma-ray energies Also the effect of disk source radius on photo-peak efficiency has been studied Besides the results of different available physics models in GEANT4 have also been compared The computed values of efficiency for point as well as for disk sources using the Penelope and Livermore physics models have been found correspondingly consistent for various values of gamma-ray energies while some differences (e g Penelope model yields 63% higher values of photo-peak efficiency for E gamma = 1 332 MeV 10 mm collimator diameter) have been observed in the corresponding valued obtained by using the Standard physics model (C) 2010 Elsevier Ltd All rights reserved

引用

页码：112 / 117

页数：6

共 8 条

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