大尺寸PWO:(Mo,Y)晶体发光均匀性的研究

Study on the Luminescence Uniformity of Large Size PbWO_4:(Mo,Y) Crystal

报道了用改进的Bridgman法生长的大尺寸PbWO4:(Mo,Y)晶体发光均匀性的表征研究。通过对大尺寸的PbWO4:(Mo,Y)晶体不同部位的透射光谱、X射线激发发射光谱、光产额和抗辐照损伤能力等光学和闪烁性能的测试,结果表明在实验所涉及的掺杂浓度范围,Mo、Y双掺杂能显著改善PbWO4晶体的发光均匀性,增强其抗辐照损伤能力。

The luminescence uniformity of large-size PbWO4:(Mo, Y) and pure PbWO4 crystals grown by modified Bridgman method was investigated through characterization on the optical transmittance, X-ray excited luminescence, light yield and irradiation damage at different distance from seed end face of large crystals. From the measuring results of the sequential distance from seed end of large crystal samples it an be concluded that large-size modified Bridgman grown PbWO4:(Mo, Y) crystal has an excellent luminescence uniformity and radiation hardness.