Temperature dependence of gamma-ray excited scintillation time profile and light yield of GSO, YSO, YAP and BGO
Temperature dependence of gamma-ray excited scintillation time profile and light yield of GSO, YSO, YAP and BGO
复制标题
GSO、YSO、YAP 和 BGO 的伽马射线激发闪烁时间曲线和光产额的温度依赖性
DOI：
10.1016/s0168-9002(97)84721-3
复制
发表时间：
1997
影响因子：
1.4
通讯作者：
M. Kokubun
中科院分区：
文献类型：
--
作者：
N. Tsuchida;M. Ikeda;T. Kamae;M. Kokubun
我们通过延迟符合法在-20和+20°C之间测量了四种无机闪烁体GSO (Gd2(SiO4)O; Ce)、YSO (Y2(SiO4)O; Ce)、YAP (YAlO3; Ce)和BGO(Bi4Ge3O12)的伽马射线激发闪烁衰减时间曲线和光产额的温度依赖性。所有晶体中都存在两到三种衰变成分，它们的光产额和衰变时间常数高度依赖于温度。发现所有四种晶体的总光输出 (t = 0 − ∞) 和有效衰减时间常数随着温度的降低而增加。当与 500 ns 时间常数积分时，随着温度降至 -10°C 以下，BGO 和 GSO 的光输出显着增加，但 YSO 和 YAP 的光输出明显下降。闪烁脉冲的上升部分显示在所有测量温度下 GSO 以及高于 10°C 的 YSO 迅速积聚，这表明 Suzuki 等人指出的从伽马射线激发的 Gd3+Y3+ 位点到 Ce3+ 发光中心的能量转移机制。
We have measured the temperature dependence of the gamma-ray excited scintillation decay time profile and light yield of four inorganic scintillators GSO (Gd2(SiO4)O; Ce), YSO (Y2(SiO4)O; Ce), YAP (YAlO3; Ce) and BGO(Bi4Ge3O12) by the delayed coincidence method between −20 and +20°C. Two to three decay components are found in all crystals, and their light yields and decay time constants are highly dependent on temperature. The total light yield (t = 0 − ∞) and the effective decay time constant are found to increase with decrease in the temperature for all four crystals. When integrated with 500 ns time constant, the light yield increases significantly for BGO and GSO but decreases appreciably for YSO and YAP, as the temperature drops below −10°C. The rising part of the scintillation pulse shows the prompt build-up for GSO in all temperatures measured and for YSO above 10°C, suggesting the energy transfer mechanism from gamma-ray excited Gd3+Y3+sites to the Ce3+luminescent centers noted by Suzuki et al.