Absolute full-energy peak efficiency calibration of a Clover-BGO detector system

被引：51
作者：
Elekes, Z
Belgya, T
Molnár, GL
Kiss, AZ
Csatlós, M
Gulyás, J
Krasznahorkay, A
Máté, Z
机构：
[1] Hungarian Acad Sci, Inst Nucl Res, ATOMKI, H-4001 Debrecen, Hungary
[2] Hungarian Acad Sci, Chem Res Ctr, Inst Isotope & Surface Chem, H-1525 Budapest, Hungary
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2003年 / 503卷 / 03期
基金：
匈牙利科学研究基金会;
关键词：
gamma-ray detection; Clover; BGO; Compton-suppression; high-energy efficiency calibration; proton resonance captured; point-pair method; add-back mode; PGAA; PIGE;
D O I：
10.1016/S0168-9002(03)00998-7
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
An absolute full-energy peak efficiency calibration of a Clover-type composite germanium gamma-ray detector system is presented. The efficiency curve was measured in the energy range of 120 keV-12.2 MeV for the first time, using the combination of proton-capture nuclear reactions and radioactive sources, such as Co-56, Co-60, Ga-66 and Eu-152. At high energies gamma-ray pairs from proton resonance capture on Al-27, Na-23, K-39 and B-11 were employed using evaporated Al, Na2WO4, K2SO4 and LiBO2 targets, respectively. The experimental data were fitted with a single polynomial function on log-log scale using a recently developed method. The add-back factor is found to increase quadratically with the energy, in contrast to the previously suggested linear relationship. The efficiency gain with respect to a single detector is about one order of magnitude at 10 MeV energy. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：580 / 588
页数：9
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