Abstract
Deconvolution of thermoluminescence(TL) curve has evolved as a subject of its own merit and has attained a mature state. Unfortunately, even with the availability of multiple methods id analysis and numerous deconvolution software, the pitfalls are many. This paper presents a comprehensive deconvolution of TL curves of a typical phosphor, namely CaAl2O4:Sm3+ and once for all settle the prevailing myths on evaluation of intrinsic trap parameters (Activation energy, E and frequency factor, s) for crystalline phosphors. The TL curves are that of four different kinds of excitation (UV, x-ray gamma-ray and electron beam) as well as ten doses of gamma-ray excitation(0.5–50 Gy). Our results show multiple discrete trap levels within the bandgap of the CaAl2O4 lattice that are a potential source for developing novel afterglow phosphors and thermoluminescence dosimeters. Finally, we provide some simple guidelines to overcome the misconceptions that have been perpetually being propagated in the literature of TL and its applications.
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