高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (5): 491.

• 研究论文 • 上一篇    下一篇

BaFCI:Tb晶体的热释发光和光激励发光

林建华, 苏勉曾   

  1. 北京大学化学系
  • 收稿日期:1987-10-27 出版日期:1989-05-24 发布日期:1989-05-24
  • 通讯作者: 苏勉曾
  • 基金资助:

    国家自然科学基金

Optically and Thermally Stimulated Luminescence of BaF Cl:Tb Crystals

Lin Jianhua, Su Mianzeng   

  1. Department of Chemistry, Peking University, Beijing
  • Received:1987-10-27 Online:1989-05-24 Published:1989-05-24

PDF (PC)

被引次数

2

摘要： BaFCl:Tb晶体的光激励发光和热释发光过程为:在X射线辐照下,晶体中产生F色心,同时掺杂的Tb3+离子俘获空穴形成Tb4+离子。X线辐照后的晶体在可见光或热激励下,F色心中释放出的电子与Tb4+复合成Tb3+并处于激发态,随后发出Tb3+)子的跃迁辐射。

关键词: 热释发光, 光激励发光, 铽, 氟氯化钡

Abstract: The mechanisms for the optically and thermally stimulated luminescence of BaFCltTb crystal are proposed. As being X-irradiated the doped trivalent terbium ion may trap a hole and be oxidized to the tetravalent state. Meanwhile the existing chloride vacancy V(Cl) in the crystal may trap an electron and is converted into a F-center. In the processes of optically and thermally stimulated luminescence the tetravalent terbium ion may capture an electron ionized from the F-(tenter and then may be reduced to the excited state of Tb3+, from which the characteristic emission of Tb3+ 5D4-7F, transition takes place.

Key words: Thermoluminescence, Photostimulated luminescence, Terbium, Barium fluochloride

TrendMD: