用北京同步辐射光源研究氟化物闪烁体的荧光时间衰减特性

Study of Fluorescent Decay Properties of FluoridesWith Beijing Synchrotron Radiation Source

介绍了利用北京同步辐射光源测量闪烁体荧光时间结构特性的新方法．并用此方法测量了纯ＢａＦ２、ＣｅＦ３晶体和粉晶样品及掺Ｌａ３＋、Ｃｅ３＋的ＢａＦ２晶体时间衰减谱．对ＢａＦ２掺稀土元素的测量结果表明，Ｌａ３＋和Ｄｅ３＋的掺入对ＢａＦ２时间衰减慢成分均有一定的抑制作用，但从理论上分析两种掺杂对慢成分的抑制机制并不相同。

A new method using synchrotron radiation source to measure the fluorescent decay properties of inorganic scintillator is introduced here.Using this method the pureBaF2,CeF3(crystal and powder),BaF2 doped with In3+.Ce3+ crystals were measured.The results indicate that the slow component of fluorescent decay of BaF2 is suppressed to a certai extent by doping of La3+ or Ce3+.However,for these BaF2scintillators doped with two kinds of impurities,the mechanism of suppression of slowcomponent are different.