Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-doping

被引：133
|
作者：
Alekhin, M. S. [1 ]
de Haas, J. T. M. [1 ]
Khodyuk, I. V. [1 ]
Kramer, K. W. [2 ]
Menge, P. R. [3 ]
Ouspenski, V. [4 ]
Dorenbos, P. [1 ]
机构：
[1] Delft Univ Technol, Fac Sci Appl, Dept Radiat Sci & Technol, NL-2629 JB Delft, Netherlands
[2] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland
[3] St Gobain Crystals, Hiram, OH 44234 USA
[4] St Gobain Res, F-93303 Aubervilliers, France
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 16期
关键词：
PROPORTIONALITY; CE3+; PERFORMANCE;
D O I：
10.1063/1.4803440
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Commercially available LaBr3:5% Ce3+ scintillators show with photomultiplier tube readout about 2.7% energy resolution for the detection of 662 keV gamma-rays. Here we will show that by co-doping LaBr3: Ce3+ with Sr2+ or Ca2+ the resolution is improved to 2.0%. Such an improvement is attributed to a strong reduction of the scintillation light losses that are due to radiationless recombination of free electrons and holes during the earliest stages (1-10 ps) inside the high free charge carrier density parts of the ionization track. (C) 2013 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4803440]
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页数：4
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