摘要
以高纯Al2O3为原料,利用石墨发热体和石墨保温桶为碳源,采用导模法生长了α-Al2O3∶C晶体,研究了氢气退火后得到的α-Al2O3∶C晶体的热致发光和光致受激发光特性.α-Al2O3∶C晶体在460K具有单一一级动力学热致发光峰,热致发光发射波长位于415nm.α-Al2O3∶C晶体的光致受激发光曲线呈指数衰减,衰减曲线由快衰减和慢衰减两部分组成.α-Al2O3∶C晶体的热致发光和光致受激发光剂量响应曲线具有线性-亚线性-饱和的特点,其中热致发光剂量响应在5×10^-6 -0.2Gy范围内呈现良好的线性关系,饱和剂量为10Gy;光致受激发光剂量响应在5×10^-6 -10Gy范围内呈现良好的线性关系,饱和剂量为30Gy.
α-Al2O3：C crystal was grown by Edge-Defined, Film-Fed Growth Technique （EFG） in which graphite heating unit and shield acted as the carbon source and high purity Al2O3 was used as the raw material. Thermoluminescence （TL） and optically stimulated luminescence （OSL） properties of as-grown crystal after annealing in H2 were investigated. The crystal shows a single one-order kinetic glow peak at 460K and blue emission band at 415nm. OSL decay curve of α-Al2O3：C crystal shows exponential characteristic. The decay curve is made up of two components, i.e. the faster component and the slower component. The TL and OSL responses of α-Al2O3：C crystal show linear-sublinear-saturation characteristics. The TL exhibits good linear dose response in the dose range from 5 × 10^-6 to 0.2Gy and saturation is about 10Gy. The OSL exhibits good linear dose response in the dose range from 5 × 10^-6 to 10Gy and saturation is about 30Gy.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第2期255-258,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(60607015)
国家863项目(2006AA03A104)
关键词
α-Al2O3∶C
热致发光
光致受激发光
导模法
α-Al2O3：C
thermoluminescence
optically stimulated luminescence
edge-defined
film-fed growth technique
