Thermally Stimulated Luminescence and Exoelectron Emission Mechanism of the 430 K (D') Dosimetric Peak of alpha-Al2O3

Autor: Gabor Molnar, Papin, E., Grosseau, P., Guilhot, B., Borossay, J., Benabdesselam, M., Iacconi, P., Lapraz, D.
Přispěvatelé: Laboratoire de Physique Electronique des Solides (LPES), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Département Poudres et Matériaux Multi-Composants (P2MC-ENSMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-SPIN, Laboratoire des Procédés en Milieux Granulaires (LPMG-EMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Department of General and Inorganic Chemistry (DGIC), Eötvös Loránd University (ELTE), Université Nice Sophia-Antipolis, Eötvös Loránd University
Jazyk: angličtina
Rok vydání: 1999
Předmět:
Zdroj: Radiation Protection Dosimetry
Radiation Protection Dosimetry, Oxford University Press (OUP), 1999, 84 (1-4), pp.253-256
ResearcherID
ISSN: 0144-8420
1742-3406
Popis: International audience; Several alpha-Al2O3 samples were studied in order to determine the mechanism of electron-hole processes of the 430 K (D') thermoluminescence (TL) and thermally stimulated exoelectron emission (TSEE) dosimetric peak. Single crystals prepared in highly reducing conditions were treated in different atmospheres (reducing/oxidizing) and their optical absorption (after isochronous annealing), fluorescence and TL properties were investigated. From these results an electron trap is suggested for the 430 K peak which is in contradiction to some data taken from the literature: this problem is then discussed. Pure and Th4+ doped alpha-Al2O3 powders were studied by TL methods regarding doping concentration and preparation conditions. In this way the role of aluminum vacancies is proved. Considering these new results, literature data and different hypotheses, the possible nature of the trap is discussed.
Databáze: OpenAIRE
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