Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-doping
Improvement of γ-ray energy resolution of LaBr3:Ce3+ scintillation detectors by Sr2+ and Ca2+ co-doping
复制标题
DOI：
10.1063/1.4803440
复制
发表时间：
2013-04-22
影响因子：
4
通讯作者：
Dorenbos, P.
中科院分区：
文献类型：
--
作者：
Alekhin, M. S.;de Haas, J. T. M.;Dorenbos, P.
市售的LaBr 3：5%Ce 3+晶体管显示出光电倍增管读出约2.7%的能量分辨率，用于检测662 keV的伽马射线。在这里，我们将表明，通过与Sr 2+或Ca 2+共掺杂LaBr 3：Ce 3+，分辨率提高到2.0%。这种改进归因于闪烁光损失的强烈减少，所述闪烁光损失是由于在电离轨道的高自由电荷载流子密度部分内的最早阶段（1-10 ps）期间自由电子和空穴的无辐射复合。(C)2013 AIP Publishing LLC. [http：//dx.doi.org/10.1063/1.4803440]
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]