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On the stochastic uncertainties of thermally and optically stimulated luminescence signals : A Monte Carlo approach

Titelangaben

Pagonis, Vasilis ; Kreutzer, Sebastian ; Duncan, Alex Roy ; Rajovic, Ena ; Laag, Christian ; Schmidt, Christoph:
On the stochastic uncertainties of thermally and optically stimulated luminescence signals : A Monte Carlo approach.
In: Journal of Luminescence. Bd. 219 (2020) . - No. 116945.
ISSN 0022-2313
DOI: https://doi.org/10.1016/j.jlumin.2019.116945

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Angaben zu Projekten

Projekttitel:
Offizieller Projekttitel
Projekt-ID
ULTIMO: Unifying LumInescence Models of quartz and feldspar – towards a comprehensive and reproducible modelling platform
57387041

Projektfinanzierung: Deutscher Akademischer Austauschdienst

Abstract

Phenomenological models are frequently used to analyze experimental signals in thermally and optically stimulated luminescence experiments. Typically, these models consist of systems of differential equations describing various electronic transitions. An alternative to the differential equation approach is the use of Monte Carlo (MC) methods, which also allow an estimation of the theoretical stochastic uncertainty of the intensity of the luminescence signal. By running and averaging several MC variants, these stochastic uncertainties are estimated in this paper for various luminescence models. In the case of first-order kinetics processes, the MC results compare well with previously published analytical results for the coefficient of variation (CV) in stochastic linear pure death processes. By contrast, no analytical results are available for the more general one trap one recombination center model (OTOR), and MC is the only method available for estimating the stochastic uncertainties. In this paper the CV coefficients are simulated for three commonly used experimental stimulation modes, namely thermally stimulated luminescence (TL), continuous-wave optically stimulated luminescence (CW-OSL) and linearly modulated OSL (LM-OSL). The results of the simulations show that CW-OSL signals have the smallest CV values among the three stimulation modes, and therefore these signals are least likely to exhibit stochastic variations. The stochastic uncertainties in these phenomenological models are discussed in the context of single grain luminescence experiments and nanodosimetric materials, in which one deals with small numbers of charge carriers.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Birth and death stochastic processes; Monte Carlo method; Thermoluminescence; Optically stimulated luminescence; Infrared stimulated luminescence
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren > Lehrstuhl Geomorphologie - Univ.-Prof. Dr. Ludwig Zöller
Profilfelder > Advanced Fields > Ökologie und Umweltwissenschaften
Profilfelder > Advanced Fields > Nichtlineare Dynamik
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren
Profilfelder
Profilfelder > Advanced Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
Eingestellt am: 09 Jan 2020 10:44
Letzte Änderung: 09 Jan 2020 10:44
URI: https://eref.uni-bayreuth.de/id/eprint/53692