AustralieFrV1, Main, Exploration, bibRecord, 00C583

Thermoluminescence mechanisms in rare earth doped CaSO4

Identifieur interne : 00C583 ( Main/Exploration ); précédent : 00C582; suivant : 00C584

Thermoluminescence mechanisms in rare earth doped CaSO4

Auteurs : V. Gerome [France] ; D. Lapraz [France] ; P. Iacconi [France] ; M. Benabdesselam [France] ; H. Prevost [France] ; A. Baumer [France]

Source :

Radiation protection dosimetry [ 0144-8420 ] ; 1999.

RBID : Pascal:99-0414274

Descripteurs français

Pascal (Inist)
- Mécanisme action, Dosimètre thermoluminescent, Cristal, Etude comparative, Composé dopé, Impureté, Fluorescence, Réflexion optique, Transfert énergie, Température recuit.

English descriptors

KwdEn :
- Annealing temperature, Comparative study, Crystals, Doped compound, Energy transfer, Fluorescence, Impurity, Mechanism of action, Optical reflection, Thermoluminescent dosimeter.

Abstract

The thermostimulated luminescence (TSL) of powdered synthetic CaSO₄ crystals is studied with various types of doping rare earth (RE³⁺) impurities: Dy³⁺, Tm³⁺, Ho³⁺, Er³⁺ or Gd³⁺. Fluorescence and optical diffuse reflectance data are presented. Valence changes of RE³⁺ are observed after X irradiation and/or thermal annealings. Defects in anionic SO^2-₄ groups (SO_x types) are shown to be responsible for the UV lattice emission and the trapping centres, while the RE³⁺ ions are just radiative emission centres. The impact of the UV lattice emission on the energy transfer towards activators is confirmed. The TSL mechanism of CaSO₄: RE³⁺ is finally discussed in the light of the observed optical properties and results from thermal annealing experiments.

Affiliations:

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Le document en format XML

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<author><name sortKey="Benabdesselam, M" sort="Benabdesselam, M" uniqKey="Benabdesselam M" first="M." last="Benabdesselam">M. Benabdesselam</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Physique Electronique des Solides (LPES), Centre de Recherche sur les Solides et leurs Applications (CRESA), Faculté des Sciences, Université de Nice-Sophia Antipolis, Parc Valrose</s1>
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<author><name sortKey="Baumer, A" sort="Baumer, A" uniqKey="Baumer A" first="A." last="Baumer">A. Baumer</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Annealing temperature</term>
<term>Comparative study</term>
<term>Crystals</term>
<term>Doped compound</term>
<term>Energy transfer</term>
<term>Fluorescence</term>
<term>Impurity</term>
<term>Mechanism of action</term>
<term>Optical reflection</term>
<term>Thermoluminescent dosimeter</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Mécanisme action</term>
<term>Dosimètre thermoluminescent</term>
<term>Cristal</term>
<term>Etude comparative</term>
<term>Composé dopé</term>
<term>Impureté</term>
<term>Fluorescence</term>
<term>Réflexion optique</term>
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<front><div type="abstract" xml:lang="en">The thermostimulated luminescence (TSL) of powdered synthetic CaSO<sub>4</sub>
 crystals is studied with various types of doping rare earth (RE<sup>3+</sup>
) impurities: Dy<sup>3+</sup>
, Tm<sup>3+</sup>
, Ho<sup>3+</sup>
, Er<sup>3+</sup>
 or Gd<sup>3+</sup>
. Fluorescence and optical diffuse reflectance data are presented. Valence changes of RE<sup>3+</sup>
 are observed after X irradiation and/or thermal annealings. Defects in anionic SO<sup>2-</sup>
<sub>4</sub>
 groups (SO<sub>x</sub>
 types) are shown to be responsible for the UV lattice emission and the trapping centres, while the RE<sup>3+</sup>
 ions are just radiative emission centres. The impact of the UV lattice emission on the energy transfer towards activators is confirmed. The TSL mechanism of CaSO<sub>4</sub>
: RE<sup>3+</sup>
 is finally discussed in the light of the observed optical properties and results from thermal annealing experiments.</div>
</front>
</TEI>
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<name sortKey="Prevost, H" sort="Prevost, H" uniqKey="Prevost H" first="H." last="Prevost">H. Prevost</name>
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Thermoluminescence mechanisms in rare earth doped CaSO4

Thermoluminescence mechanisms in rare earth doped CaSO4

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