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|Title:||Estimation of optimal trapping parameters relevant to persistent luminescence|
Singh, M Nara
Singh, Th Basanta
|Abstract:||Five sets of thermoluminescence (TL) peaks with activation energy <i>E</i> = 0.50, 0.65, 0.75, 1.00 and 1.25 eV varying the frequency factor (s) over a zone 10<sup>8</sup> ≤ s ≤ 10<sup>14</sup> s<sup>-1</sup> following the simple kinetics equation for order of kinetics <i>b</i> = 1, 1.5 and 2 for various heating rates (<img src='/image/spc_char/beta.gif' border=0> = 1, 2 and 5 °s<sup>-1</sup>), have been generated numerically. The results are compared with experimental data in a general way in terms of peak temperature (<i>T</i>m) as well as the profile of the whole TL peak/TL curve that is relevant to persistent luminescence. Computerized Glow Curve Deconvolution (CGCD) of some of the experimental thermoluminescence (TL) data published in <i style="">J Mater Chem</i>, 15 <b style="">(</b>2005) 4025, has also been studied. Based on the simulated TL peaks and analysis of the experimental TL curves, it is demonstrated that TL is potentially a sensitive as well as useful technique in development and characterization of materials exhibiting persistent luminescence. Finally, some guidelines are provided to interpret the TL data without rigorous deconvolution of the glow curves that has become the usual practice by practitioners of TL researchers of the field of TL dosimetry.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.49(09) [September 2011]|
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