摘要
研究了 Ｂｒｉｄｇｍａｎ 法生长的 Ｓｂ 掺杂钨酸铅（ Ｐ Ｗ Ｏ） 晶体中 Ｓｂ 的分布和闪烁特性。晶体中 Ｓｂ 含量的测定表明， Ｓｂ 在 Ｐ Ｗ Ｏ 晶体中的分凝系数约为０ ．６３ 。由于 Ｓｂ 掺杂可以补偿 Ｐ Ｗ Ｏ 晶体的组分缺失而降低其中空位和一些色心的浓度，与未掺杂晶体相比较， Ｓｂ 掺杂晶体具有更好的光学透过率和更高的发光强度。而且，在富氧气氛下退火后， Ｓｂ 掺杂晶体的发光谱特征变化较小，仍能保持较高的快慢分量比。
The Sb distribution and some scintillation properties of Sb doped lead tungstate (PWO) crystals grown by modified Bridgman method were investigated.The measurements of Sb content in crystals indicated that the segregation coefficient Sb in PWO crystals is about 0.63.Because Sb doping can compensate the composition deficiency in the PWO crystals and then reduce the density of vacancies and some color centers,compared with the undoped crystals,Sb doped crystals have better optical transmission and higher luminescence intensity.Furthermore,after annealing in oxygen rich atmosphere,the Sb doped PWO crystals can still remain a high percentage of the fast component for their less change of luminescence character.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
1999年第3期258-262,共5页
Journal of Synthetic Crystals
基金
国家自然科学重点基金
关键词
掺杂
钨酸铅晶体
发光强度
闪烁晶体
锑
分布
Sb doped PWO crystals,segregation coefficient,transmission,luminescence intensity,scintillation crystal
