Cascade summing effects in close geometry gamma-ray spectrometry

被引：20

作者：

Johnston, Peter N.

Hult, Mikael

Gasparro, Joel

机构：

[1] IRMM, JRC, EC, B-2440 Geel, Belgium

[2] Royal Melbourne Inst Technol, Melbourne, Vic 3001, Australia

来源：

APPLIED RADIATION AND ISOTOPES | 2006年 / 64卷 / 10-11期

关键词：

low-level; gamma-ray spectrometry; Ru-106; Al-26; cascade summing; true summing; EGS4; Monte-Carlo simulations;

D O I：

10.1016/j.apradiso.2006.02.038

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Low-level gamma-ray spectrometry, particularly in underground laboratories, is used to measure radioactivity in diverse close geometries, often placing samples directly on the detector which favours strong cascade summing effects. Monte-Carlo modelling of the efficiency is extended to cascade summing effects from complete decay sequences including positron emitting radionuclides. The effect of geometrical uncertainties on the overall uncertainty is presented. The results reinforce the need for radiography of the detector and inclusion of the detector shielding in the model. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1323 / 1328

页数：6

共 7 条

[1] Monte Carlo calculations of coincidence-summing corrections for volume sources in gamma-ray spectrometry with Ge detectors [J].