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Thermally stimulated luminescence glow curve structure of β‐irradiated CaB 4 O 7 :Dy
Author(s) -
Akın Aycan,
Ekdal Elçin,
Tuncer Arslanlar Yasemin,
Ayvacıklı Mehmet,
Karalı Turgay,
Can Nurdoğan
Publication year - 2015
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2826
Subject(s) - luminescence , activation energy , frequency factor , analytical chemistry (journal) , irradiation , kinetic energy , isothermal process , thermoluminescence , kinetics , glow discharge , deconvolution , materials science , chemistry , optics , plasma , physics , thermodynamics , optoelectronics , nuclear physics , chromatography , quantum mechanics
Abstract Thermally stimulated luminescence glow curves of CaB 4 O 7 :Dy samples after β‐irradiation showed glow peaks at ~335, 530 and 675 K, with a heating rate of 2 K/s. The main peak at 530 K was analyzed using the T max –T stop method and was found to be composed of at least five overlapping glow peaks. A curve‐fitting program was used to perform computerized glow curve deconvolution (CGCD) analysis of the complex peak of the dosimetric material of interest. The kinetic parameters, namely activation energy ( E ) and frequency factor ( s ), associated with the main glow peak of CaB 4 O 7 :Dy at 520 K were evaluated using peak shape (PS) and isothermal luminescence decay (ILD) methods. In addition, the kinetics was determined to be first order ( b =1) by applying the additive dose method. The activation energies and frequency factors obtained using PS and ILD methods are calculated to be 0.72 and 0.72 eV and 8.76 × 10 5 and 1.44 × 10 6 /s, respectively. Copyright © 2014 John Wiley & Sons, Ltd.