title: Component resolved bleaching study in natural calcium fluoride using CW-OSL, LM-OSL and residual TL glow curves after bleaching.
abstract: Natural calcium fluoride has been commonly used as thermoluminescence (TL) dosimeter due to its high luminescence intensity. The aim of this work includes attempting a correlation between specific TL glow curves after bleaching and components of linearly modulated optically stimulated luminescence (LM-OSL) as well as continuous wave OSL (CW-OSL). A component resolved analysis was applied to both integrated intensity of the RTL glow curves and all OSL decay curves, by using a Computerized Glow-Curve De-convolution (CGCD) procedure. All CW-OSL and LM-OSL components are correlated to the decay components of the integrated RTL signal, apart from two RTL components which cannot be directly correlated with either LM-OSL or CW-OSL component. The unique, stringent criterion for this correlation deals with the value of the decay constant λ of each bleaching component. There is only one, unique bleaching component present in all three luminescence entities which were the subject of the present study, indicating that each TL trap yields at least three different bleaching components; different TL traps can indicate bleaching components with similar values. According to the data of the present work each RTL bleaching component receives electrons from at least two peaks. The results of the present study strongly suggest that the traps that contribute to TL and OSL are the same.
authors.affiliation: Aristotle University of Thessaloniki, Nuclear Physics Laboratory, 54124 Thessaloniki, Greece.
authors.forename: Vasiliki
authors.initials: V
authors.lastname: Angeli
authors.affiliation: Insitute of Nuclear Sciences, Ankara University, TR-06100 Beşevler, Ankara, Turkey. Electronic address: gspolymeris@ankara.edu.tr.
authors.forename: George S
authors.initials: GS
authors.lastname: Polymeris
authors.affiliation: Aristotle University of Thessaloniki, Nuclear Physics Laboratory, 54124 Thessaloniki, Greece.
authors.forename: Ioanna K
authors.initials: IK
authors.lastname: Sfampa
authors.affiliation: Laboratory of Radiation Applications and Archaeological Dating, Department of Archaeometry and Physicochemical Measurements, 'Athena' - Research and Innovation Center in Information, Communication and Knowledge Technologies, Kimmeria University Campus, 67100 Xanthi, Greece.
authors.forename: Nestor C
authors.initials: NC
authors.lastname: Tsirliganis
authors.affiliation: Aristotle University of Thessaloniki, Nuclear Physics Laboratory, 54124 Thessaloniki, Greece.
authors.forename: George
authors.initials: G
authors.lastname: Kitis