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Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (11): 1201-1204. Previous Articles     Next Articles

Original Articles

单掺杂与共掺杂离子对Sr2Mg(BO3)2磷光体热释发光的影响

刘丽艳a,b 李成宇*,a 郝景权a 唐 强c
张纯祥c 张彦立d 苏 锵*,a

  

  1. (a中国科学院长春应用化学研究所稀土资源利用国家重点实验室 长春 130022)
    (b沈阳师范大学化学与生命科学学院 沈阳 110034)
    (c中山大学物理系 广州 510275)
    (d中国计量科学院电力辐射与医学处 北京 130000)

  • 投稿日期:2008-03-27 修回日期:2009-12-01 发布日期:2009-06-14
  • 通讯作者: 李成宇

Effect of Single- and co-Dopant on TL of Sr2Mg(BO3)2 Phosphor

Liu, Liyan a,b Li, Chengyu *,a Hao, Jingquan a Tang, Qiang c
Zhang, Chunxiang c Zhang, Yanli d Su, Qiang* ,a
  

  1. (a State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry,
    Chinese Academy of Sciences, Changchun 130022)
    (b College of Chemistry and Life Sciences of Shenyang Normal University, Shenyang 110034)
    (c Department of Physics, Sun Yat-sen University, Guangzhou 510275)
    (d Ionizing Radiation Division, National Institute of Metrology, Beijing 130000)

  • Received:2008-03-27 Revised:2009-12-01 Published:2009-06-14
  • Contact: Li, Chengyu

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Sr2Mg(BO3)2 thermoluminescence (TL) phosphor was synthesized by a high temperature solid state reaction and the effect of Li＋, Bi3＋, Gd3＋or Ti4＋ as a codopant on TL of Sr2Mg(BO3)2∶Dy was investigated. The results show that Li＋ as a codopant improves the emission intensity of high temperature TL peak of Sr2Mg(BO3)2∶Dy phosphor whereas the addition of Bi3＋, Gd3＋ or Ti4＋ leads to the decrease of TL intensity. The TL emission bands of Sr2Mg(BO3)2∶Dy phosphors with Li＋, Bi3＋, Gd3＋ or Ti4＋ as a codopant are situated at 480, 579, 662 and 755 nm, which were attributed to the characteristic 4F9/2→6H15/2, 4F9/2→6H13/2, 4F9/2→6H11/2 and 4F9/2→6H9/2 transitions of Dy3＋ ion, consistent with the emission of Sr2Mg(BO3)2∶Dy phosphors. The kinetics parameters of 234 ℃ TL peak of Sr2Mg(BO3)2∶ phosphor with the values of trap depth E＝1.1 eV, frequency factor s＝6.3×109 s－1 were estimated by a peak shape method, which obey the second order kinetics.

Key words: thermoluminescence, Sr2Mg(BO3)2, dysprosium, gamma ray