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SrB6O10∶Tb的热释光性质研究
Thermoluminescence Properties of SrB6O10∶Tb
【摘要】 通过高温固相法合成了SrB6O10∶Tb热释光磷光体,并系统地研究了Ce3+,Li+共掺杂,Tb3+掺杂浓度以及60Coγ射线辐照剂量对其热释发光的影响,同时观察了其热释光发射。研究发现:Ce3+,Li+共掺杂对SrB6O10∶Tb磷光体的热释光灵敏度并没有提高。Tb3+掺杂浓度对SrB6O10热释光磷光体的灵敏度有一定影响:在从1%~10%(摩尔分数)的Tb3+掺杂浓度范围内,2%为最佳掺杂浓度。在此掺杂浓度条件下,用Chen的峰形法评估了此磷光体的动力学参数,发现其遵守二级动力学;增加辐照剂量,热释光发射也随之增强,并在所研究的剂量范围内呈线性变化;在其三维热释光发射谱中,观察到了Tb3+离子的特征发射。
【Abstract】 SrB6O10∶Tb phosphor was synthesized by high-temperature solid state reaction.The influences of Ce3+ or Li+ as a co-dopant,Tb3+ concentration and irradiation dose exposure on TL of SrB6O10∶Tb were investigated.Results show Ce3+ or Li+ as a co-dopant can not improve the TL sensitivity of SrB6O10∶Tb phosphor.TL response is Tb3+ dopant concentration dependent with optimum value 2%.With these,Tb3+ concentrations,the kinetic parameters of SrB6O10∶Tb are calculated employing the peak shape method and found it obeys the second order kinetics;TL emission strengthens with irradiation exposure and is linear in the irradiation dose range of 50~200 Gy;characteristic Tb3+ ion emission is observed in 3D TL spectrum.
【Key words】 thermoluminescence; strontium hexaborate; terbium; rare earths;
- 【文献出处】 中国稀土学报 ,Journal of The Chinese Rare Earth Society , 编辑部邮箱 ,2005年05期
- 【分类号】O482.31;
- 【被引频次】7
- 【下载频次】165