Influence of carbon on the thermoluminescence and optically stimulated luminescence of α -Al2 O3 :C crystals
文献类型：期刊论文
| 作者 | Yang XB(杨新波) ; Li HJ(李红军) ; Bi Qun-Yu ; Cheng Yan ; Tang Qiang ; Xu J(徐军) |
| 刊名 | j. appl. phys.
 |
| 出版日期 | 2008 |
| 卷号 | 104期号:12页码:123112 |
| 关键词 | absorption coefficients alumina carbon doping profiles F-centres photoluminescence thermoluminescence vacancies (crystal) |
| ISSN号 | 0021-8979 |
| 中文摘要 | alpha-al2o3:c crystal shows excellent thermoluminescence (tl) and optically stimulated luminescence (osl) properties but the real role carbon plays in this crystal is still not clearly understood so far. in this work, alpha-al2o3:c crystal doping with different amounts of carbon were grown by the temperature gradient technique, and tl and osl properties of as-grown crystals were investigated. additionally, a mechanism was proposed to explain the role of carbon in forming the tl and osl properties of alpha-al2o3:c. tl and osl intensities of as-grown crystals increase with the increasing amount of carbon doping in the crystal, but no shift is found in the glow peak location at 465 k. as the amount of carbon doping in the crystals decreases, osl decay rate becomes faster. with the increase in heating rate, the integral tl response of as-grown crystals decreases and glow peak shifts to higher temperatures. tl response decrease rate increases with the increasing amount of carbon doping in the crystals. all the tl and osl response curves of as-grown crystals show linear-sublinear-saturation characteristic, and osl dose response exhibits higher sensitivity and wider linear dose range than that of tl. the crystal doping with 5000 ppm carbon shows the best dosimetric properties. carbon plays the role of a dopant in alpha-al2o3:c crystal and four-valent carbon anions replace the two-valent anions of oxygen during the crystal growth process, and large amounts of oxygen vacancies were formed, which corresponds to the high absorption coefficient of f and f+ centers in the crystals. |
| 学科主题 | 光学材料;晶体 |
| 收录类别 | EI |
| 资助信息 | national high technology research and development program of china [2006aa03a104]; national natural science foundation of china [60607015] |
| 语种 | 英语 |
| 公开日期 | 2009-09-24 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/6125]  |
| 专题 | 上海光学精密机械研究所_激光与光电子功能材料研发中心 |
| 推荐引用方式 GB/T 7714 |
Yang XB,Li HJ,Bi Qun-Yu,et al. Influence of carbon on the thermoluminescence and optically stimulated luminescence of α -Al |
| APA |
杨新波,李红军,Bi Qun-Yu,Cheng Yan,Tang Qiang,&徐军.(2008).Influence of carbon on the thermoluminescence and optically stimulated luminescence of α -Al |
| MLA |
杨新波,et al."Influence of carbon on the thermoluminescence and optically stimulated luminescence of α -Al |
入库方式： OAI收割
来源：上海光学精密机械研究所
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