GEANT4 code for simulation of a germanium gamma-ray detector and its application to efficiency calibration

被引:124
作者
Hurtado, S
García-León, M
García-Tenorio, R
机构
[1] Univ Sevilla, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, Spain
[2] Univ Sevilla, Dept Fis Aplicada 2, E-41080 Seville, Spain
关键词
gamma-spectrometry; efficiency calibration; efficiency transfer; Monte Carlo simulation; optimised detector model; GEANT4; variance reduction;
D O I
10.1016/j.nima.2003.09.057
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The GEANT4 software was developed by RD44, a world-wide collaboration of national institutes, laboratories and large High-Energy Physics experiments. GEANT4 is a public software package composed of tools which can be used to accurately simulate the passage of particles through matter. In this article, the first attempt to use GEANT4 to model a reverse electrode germanium detector (REGe), and to improve also its efficiency calibration procedure, is presented. A variance reduction algorithm based on a directional bias scheme is implemented into GEANT4 in order to accelerate the efficiency computations. A fast optimisation method to model the detector geometry using standard point sources is also presented and validated for point, Marinelli and air filter sources. The simulated full-energy peak efficiencies agreed with the measured values to within 1% between 36 and 1460 keV for these three counting geometries. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:764 / 774
页数:11
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