【摘要】 根据BaF2晶体闪烁光快、慢成分波段的不同,设计并制备了用于抑制该晶体闪烁光慢成分的 Al2O3/MgF2/Al/MgF2…光子带隙膜系。实验结果显示:加载光子带隙膜系的BaF2晶体,其闪烁光快/慢成分 比提高80倍以上;经剂量为1×105Gy的60Coγ射线辐照后,其透射光谱、发射光谱和发光衰减时间谱没有明 显的变化,这表明由光子带隙膜系与BaF2晶体所构成的快闪烁器件不仅可有效避免慢成分的干扰,而且还具 有很强的抗γ辐射性能。更多还原

【Abstract】 On the basis of the different emission bands between the fast and slow components in BaF₂ crystal, the photonic band multilayer filter with 3.5 periods of Al₂O₃/MgF₂/Al/MgF₂... was designed and developed in order to suppress the slow component of the scintillation light in BaF₂. It is shown that the filter can increase more than 80 times of the ratio of the intensities of the fast emission to the slow one, while the transmission, emission and decay time spectra of BaF₂ crystal modified by the filter are not changed apparently after ⁶⁰Co γ-ray irradiation under the dose of 10⁵ Gy. The results indicate that BaF₂ crystal modified by the filter can not only avoid the interference of the slow component effectively, but also keep the good radiation resistance.更多还原