摘要
以高温固相反应合成CdWO4多晶为原料,采用垂直坩埚下降法生长出大尺寸完整CdWO4晶体,就所生长CdWO4晶体进行了闪烁发光性能的测试表征,包括紫外可见透射光谱、光致发光光谱、光致发射衰减时间、X射线激发发射光谱、相对光产额以及γ射线辐照硬度。结果表明,该单晶在可见光区具有良好的光学透过性,其光致发光与X射线激发发射光的峰值波长位于475 nm左右,其光致发射衰减时间为842 ns;以CsI∶Tl晶体为基准样品,测得γ射线激发发光的光产额相当于基准样品的51.5%～57.4%,在γ射线辐照条件下其辐照硬度达107rad。
Using the solid-state synthesized CdWO4 polycrystalline as the feed material, large-size CdWO4 single crystals were grown by vertical Bridgman process. The scintillation properties of CWO single crystals were characterized systematically by UV-visible transmission spectra, photoluminescence spectra, photoluminescence decay curve, X-ray excited luminescence spectra, the relative light yield and T-ray radiation hardness. The spectrum measurements show a high optical transmittance in the visible wavelength range and a strong emission with central wavelength at 475 nm under X-ray excitation. The photoluminescence decay time with central wavelength of 475 nm was measured to be 842 ns under the ultraviolet radiation. The relative light yield under γ-ray excitation was measured to be 51.5% -57.4% as compared to the standard sample CsI： T1. The single crystals were confirmed to possess a high irradiation hardness by the measured γ-ray radiation hardness of 107 rad.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第4期844-848,852,共6页
Journal of Synthetic Crystals
基金
973计划前期研究专项(2011CB612306)
国家自然科学基金(21171102)
宁波市自然科学基金(2010A610165)
宁波大学科研基金(xkl09074
xkl067)
宁波大学王宽诚幸福基金
关键词
钨酸镉
坩埚下降法
衰减时间
辐照硬度
CdWO4
vertical Bridgman technique
decay time
radiation hardness
作者简介
沈琦（1986-），女，浙江省人，硕士研究生。
通讯作者：陈红兵，博士，研究员。E-mail：chenhongbing@nbu．edu．cn
