AustralieFrV1, Main, Exploration, bibRecord, 00C585

Thermally stimulated luminescence and exoelectron emission mechanism of the 430 K (D') dosimetric peak of α-Al2O3

Identifieur interne : 00C585 ( Main/Exploration ); précédent : 00C584; suivant : 00C586

Thermally stimulated luminescence and exoelectron emission mechanism of the 430 K (D') dosimetric peak of α-Al2O3

Auteurs : G. Molnar [France, Hongrie] ; E. Papin [France] ; P. Grosseau [France] ; B. Guilhot [France] ; J. Borossay [Hongrie] ; M. Benabdesselam [France] ; P. Iacconi [France] ; D. Lapraz [France]

Source :

Radiation protection dosimetry [ 0144-8420 ] ; 1999.

RBID : Pascal:99-0414305

Descripteurs français

Pascal (Inist)
- Mécanisme action, Thermoluminescence, Emission exoélectronique, Aluminium oxyde, Paire électron trou, Propriété optique, Piégeage, Dosimétrie, Cristal.

English descriptors

KwdEn :
- Aluminium oxide, Crystals, Dosimetry, Electron hole pair, Exoelectron emission, Mechanism of action, Optical properties, Thermoluminescence, Trapping.

Abstract

Several α-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/oxidising) 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 α-Al₂O₃powders were studied by TL methods regarding doping concentration and preparation conditions. In this way the role of aluminium vacancies is proved. Considering these new results, literature data and different hypotheses, the possible nature of the trap is discussed. ew results, data and different hypotheses, the possible nature of the trap is discussed.

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium oxide</term>
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<term>Electron hole pair</term>
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<term>Mechanism of action</term>
<term>Optical properties</term>
<term>Thermoluminescence</term>
<term>Trapping</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Mécanisme action</term>
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<front><div type="abstract" xml:lang="en">Several α-Al<sub>2</sub>
O<sub>3</sub>
 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/oxidising) 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 Th<sup>4+</sup>
 doped α-Al<sub>2</sub>
O<sub>3</sub>
powders were studied by TL methods regarding doping concentration and preparation conditions. In this way the role of aluminium vacancies is proved. Considering these new results, literature data and different hypotheses, the possible nature of the trap is discussed. ew results, data and different hypotheses, the possible nature of the trap is discussed.</div>
</front>
</TEI>
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Thermally stimulated luminescence and exoelectron emission mechanism of the 430 K (D') dosimetric peak of α-Al2O3

Thermally stimulated luminescence and exoelectron emission mechanism of the 430 K (D') dosimetric peak of α-Al2O3

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri