大尺寸PWO:(Sb,Y)晶体光谱特性的表征研究

报道了用改进的Bridgmam法生长的大尺寸PbWO4:(Sb,Y)晶体的光谱特性的表征研究.通过对依次切自大尺寸PbWO4:(Sb,Y)毛坯晶体的籽晶端、中间部位和顶端三块晶体(-23mm×23mm×20mm)的透射光谱、X射线激发发射光谱、紫外激发与发射光谱、发光衰减寿命、光产额和辐照损伤等方面的光谱性能测试,结果表明,Sb、Y双掺杂能显著改善PbWO4晶体的光谱性能,使晶体在短波330-420nm范围的透过率明显提高,光产额增加,抗辐照能力增强.但从籽晶端到顶端的性能存在一定的差异,说明大尺寸的PbWO4:(Sb,Y)晶体的均匀性还有待提高.

Characterization on the Optical Properties of Large PbWO4:(Sb,Y) Crystal

This paper presents the characterization and investigation of the optical properties on doubly-doped large PbWO₄:(Sb,Y) crystals grown by the modified Bridgman method. Based on the comparison measurement of the optical transmission spectra, X-ray excited luminescence, photoluminescence, decay time, light yield and irradiation damage for 23mm×23mm×20mm crystal samples cut from seed end, middle part and top end of a large PbWO₄:(Sb,Y) crystal ingot, the results show that co-doping Sb and Y can significantly improve the light yield, radiation hardness and other spectroscopic properties of PbWO₄ crystal. However, the uniformity of large PbWO₄:(Sb,Y) crystal needs to be further improved based on the comparison of measurement results.