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首页> 外文期刊>Nuclear instruments and methods in physics research >Thermoluminescence glow curve analysis of UV irradiated long persistence CaS: Pr~(3+) phosphor through computerized glow curve deconvolution technique
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Thermoluminescence glow curve analysis of UV irradiated long persistence CaS: Pr~(3+) phosphor through computerized glow curve deconvolution technique

机译：利用计算机辉光曲线去卷积技术分析紫外辐照的长余辉CaS：Pr〜（3+）荧光粉的热致发光辉光曲线

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摘要

Thermoluminescence of Pr~(3+) doped CaS phosphor has been investigated and reported in this manuscript. The TL studies on poly-crystalline sample of this phosphor show a double peak structure with maxima centered at 89 ℃ and a shoulder at around 133 ℃ when excited with UV radiation. Maximum TL intensity is observed at.Pr concentration of 0.25 mol%. The UV exposure time is varied in a wide range from 10 s to 24 h and practically no shift in T_m is observed. T_m-T_(stop) and E-T_(stop) methods suggest that there are eight trapping levels operative in this phosphor with energy values varying between 0.5 and 1.0 eV. These values are used as input for CGCD procedure and trapping parameters are evaluated. The glow curve is found to be composed from linear superposition of eight peaks. The figure of merit (FOM) during fitting procedures is found to be around 1.6%. Higher fading rates are observed for peak centered on 89 ℃ while the peak at 133 ℃ is found to show 30% fading after 6 days of storage time. Decay studies carried out on the present phosphor reveal a multi-exponential contribution.
机译：Pr〜（3+）掺杂的CaS荧光粉的热致发光已经在本文中进行了研究和报道。对这种磷光体的多晶样品进行的TL研究表明，当被紫外线辐射激发时，双峰结构的最高峰位于89℃，而肩峰位于133℃左右。在0.25摩尔％的Pr浓度下观察到最大TL强度。紫外线暴露时间在10 s至24 h的宽范围内变化，并且实际上未观察到T_m的变化。 T_m-T_（停止）和E-T_（停止）方法表明，该磷光体中有八个俘获能级，其能量值在0.5到1.0 eV之间变化。这些值用作CGCD程序的输入，并评估陷印参数。发现辉光曲线由八个峰的线性叠加组成。拟合过程中的品质因数（FOM）被发现约为1.6％。对于以89℃为中心的峰，观察到较高的褪色率，而在储存6天后，在133℃的峰显示出30％的褪色。对本发明的荧光粉进行的衰减研究显示出多指数的贡献。

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  • 作者

    Shreyas S. Pitale; Suchinder K. Sharma; R.N. Dubey; M.S. Qureshi; M.M. Malik;

  • 作者单位

    Luminescence Laboratory, Department of Physics, Maulana Azad National Institute of Technology, Bhopal 462007, India;

    Luminescence Laboratory, Department of Physics, Maulana Azad National Institute of Technology, Bhopal 462007, India;

    Luminescence Laboratory, Department of Physics, Maulana Azad National Institute of Technology, Bhopal 462007, India;

    Luminescence Laboratory, Department of Physics, Maulana Azad National Institute of Technology, Bhopal 462007, India;

    Luminescence Laboratory, Department of Physics, Maulana Azad National Institute of Technology, Bhopal 462007, India;

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  • 正文语种 eng
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  • 关键词

    sulfide phosphors; thermoluminescence; CGCD; trapping parameters;

    机译：硫化磷;热致发光CGCD;捕获参数;
  • 入库时间 2022-08-18 00:48:03

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