改进BaF_2闪烁体光输出特征研究  

Study on modifying the output properties of BaF_2 scintilation spectrum

作　　者：徐荣昆[1] 郭存[1] 温树槐[1] 夏广新[1] 宁佳敏[1] 宋凤军[1] 何锡钧[1] 吴永刚[2] 顾牡[2] 陈玲燕[2] 吴翔[2] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]同济大学波耳固体物理研究所,上海200902

出　　处：《物理学报》2003年第9期2140-2144,共5页Acta Physica Sinica

基　　金：中国工程物理研究院行业科技预研基金(批准号 :2 0 0 0 0 2 13 )资助的课题~~

摘　　要：介绍旨在抑制BaF2 闪烁体慢发光成分 ,拓展其应用领域的紫外滤光膜系设计和性能测量结果 ,研究表明 ,以Al2 O3 MgF2 Al MgF2 为基本结构优化设计的紫外滤光膜系对来自BaF2 闪烁体不同角度入射的快 慢成分光分别具有高透射和强截止特性 .还提供了用纳秒级脉冲辐射源激发“BaF2 +紫外滤光膜系 +光电闪烁探测器”系统获得的BaF2 闪烁体时间响应曲线 。In order to extend the scope of application of BaF2 scintillators in the diagnosis of the fast-pulse-radiation-field, an ultraviolet-light-filter has been developed for the modification of the scintillation spectrum. The experimental results reveal that the filter, which is composed of Al2O3, MgF2, and Al, has a very low transmittance to the slow component light emitted by BaF2 in the incident angles from 0degrees to 45degrees with respect to the surface normal, but has a relatively high transmittance to the fast component light also emitted by it. The property of the temporal response curve has been obtained by use of a pulse x-rays source, and the damage effect induced by the irradiation of the neutron with an energy of 14.1 MeV is also introduced in this paper.

关 键 词：BaF2闪烁体 光输出特征 紫外滤光膜系 辐照损伤特性 时间响应 二氟化钡 中子探测 光电闪烁探测器 

分 类 号：O774[理学—晶体学]