CONFERENCE PROCEEDINGS OF THE 4 ASIA PACIFIC LUMINESCENCE AND ELECTRON SPIN RESONANCE DATING CONFERENCE NOV 23-25, 2015, ADELAIDE, AUSTRALIA
BLEACHING BY BLUE STIMULATION AND X-RAY IRRADIATION RESPONSE OF Al2O3:C TL GLOW PEAKS SEPARATED BY DECONVOLUTION
1
Department of Semiconductor Physics, Kangwon National University, Chuncheon, 24341, South Korea, Korea (South)
2
Radiation detection, Radiation Technology Institute, Neosiskorea Co. Ltd., Korea (South)
3
Department of Mathematics, Kangwon National University, Korea (South)
These authors had equal contribution to this work
Submission date: 2025-12-16
Acceptance date: 2026-09-01
Publication date: 2026-10-22
Corresponding author
DUKGEUN HONG
Department of Semiconductor Physics, Kangwon National University, Chuncheon, 24341, South Korea, Korea (South)
Department of Semiconductor Physics, Kangwon National University, Chuncheon, 24341, South Korea, Korea (South)
Geochronometria 2025;52(APLED )
KEYWORDS
bleachingkinetic parametersAl2O3:Cthermal quenchingcomputerized glow curve deconvolution (CGCD) methodradiation dose response
TOPICS
ABSTRACT
In this study, we separated the TL glow peak of the Al2O3:C sample and investigated the blue light-stimulated bleaching and radiation dose response of each isolated TL glow peak. Prior to these studies, the measured TL glow peaks were corrected for thermal quenching using the pulsed light-stimulated luminescence (POSL) technique based on the Mott-Seitz model. The resulting quenching parameters were W = 1.10 ± 0.02 (eV) and υ = 2.54 ± 1.21 × 1014 (s-1). The Tm-Tstop method was used to obtain information on the number of overlapping peaks in the TL signal corrected for thermal quenching, and the computerized glow curve deconvolution (CGCD) method with applied general order kinetics was employed to obtain the TL kinetic parameters. The glow curves exhibited at least three component glow peaks (197 ± 3 °C, 227 ± 2 °C, and 318 ± 2 °C, denoted as C1, C2, and C3, respectively). In all isolated peaks, the bleaching effect by blue light stimulation exhibited two different exponential decay patterns, including a fast initial bleaching rate followed by a slower bleaching rate, which could be explained by the competition between optical stimulation and phototransfer. In the dose response study, peaks C1 and C2 showed a sublinear dose response, while peak C3 exhibited a supralinear response.
ACKNOWLEDGEMENTS
This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (RS-2025-25396349 and RS-2025-25415913).
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