Precise efficiency calibration of an HPGe detector up to 3.5 MeV, with measurements and Monte Carlo calculations

被引：78

作者：

Helmer, RG

Nica, N

Hardy, JC

Iacob, VE

机构：

[1] Idaho State Univ, Idaho Accelerator Ctr, Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA

[2] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA

来源：

APPLIED RADIATION AND ISOTOPES | 2004年 / 60卷 / 2-4期

关键词：

Ge detector; precise efficiency; measurements; 20-3500; keV; Monte Carlo;

D O I：

10.1016/j.apradiso.2003.11.012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Previously we used relative and absolute efficiency measurements combined with Monte Carlo calculations to define the efficiency of an HPGe gamma-ray detector with 0.2% accuracy from 50 to 1400keV. This work has been extended to 4.8 MeV with measurements of relative efficiencies from Na-24, (CO)-C-56, and Ga-66 sources. The combined results of experiment and calculation yield an efficiency curve up to 3.5 MeV with 0.4% accuracy. Single- and double-escape peak contributions also agree with calculation if positron annihilation-in-flight is incorporated. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：173 / 177

页数：5

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