ThuliumV1, Main, Exploration, bibRecord, 001119

Irradiation effects in oxide glasses doped with transition and rare-earth elements

Identifieur interne : 001119 ( Main/Exploration ); précédent : 001118; suivant : 001120

Irradiation effects in oxide glasses doped with transition and rare-earth elements

Auteurs : E. Malchukova [France] ; B. Boizot [France] ; G. Petite [France] ; D. Ghaleb [France]

Source :

EPJ. Applied physics : (Print) [ 1286-0042 ] ; 2009.

RBID : Pascal:09-0117343

Descripteurs français

Pascal (Inist)
- Luminescence, Effet rayonnement, Irradiation bêta, Résonance paramagnétique éléctronique, Matériau dopé, Silicate, Oxyde, Verre, Lanthanide, Métal transition, Addition thulium, Aluminosilicate, Verre borosilicate, 7123C, 7630K, 7855Q.
Wicri :
- topic : Oxyde, Verre.

English descriptors

KwdEn :
- Aluminosilicates, Beta irradiation, Borosilicate glass, Doped materials, Electron paramagnetic resonance, Glass, Luminescence, Oxides, Radiation effects, Rare earths, Silicates, Thulium additions, Transition elements.

Abstract

The effect of β-irradiation on silicate and aluminoborosilicate glasses doped with transition metals (TM) and rare earth (RE) elements has been studied using Electron Paramagnetic Resonance (EPR), Raman and luminescence spectroscopy. Irradiation leads to the reduction of both Cr and Mn ions in both types of glass matrix. It is shown that even small amounts of TM dopants completely block defect production, as occurs under irradiation in non-doped glasses. As well, TM doping results in the disappearance of structural changes in the glass (densification, polymerization increase and Na migration) for doses of ∼10⁹ Gy. Unlike TM-doped matrices, incorporation of RE ions into aluminoborosilicate glass blocks neither defect production nor structural changes in glass matrices during irradiation. Simultaneously, we observe a reduction of RE ions, most clearly demonstrated for Ce⁴⁺ ions in aluminoborosilicate glasses. We propose that the relative stability of the different charge states of the RE ions is linked to the efficiency of the reduction process, and therefore to the evolution of the glass structure during irradiation.

Affiliations:

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Le document en format XML

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<term>Electron paramagnetic resonance</term>
<term>Glass</term>
<term>Luminescence</term>
<term>Oxides</term>
<term>Radiation effects</term>
<term>Rare earths</term>
<term>Silicates</term>
<term>Thulium additions</term>
<term>Transition elements</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Luminescence</term>
<term>Effet rayonnement</term>
<term>Irradiation bêta</term>
<term>Résonance paramagnétique éléctronique</term>
<term>Matériau dopé</term>
<term>Silicate</term>
<term>Oxyde</term>
<term>Verre</term>
<term>Lanthanide</term>
<term>Métal transition</term>
<term>Addition thulium</term>
<term>Aluminosilicate</term>
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<front><div type="abstract" xml:lang="en">The effect of β-irradiation on silicate and aluminoborosilicate glasses doped with transition metals (TM) and rare earth (RE) elements has been studied using Electron Paramagnetic Resonance (EPR), Raman and luminescence spectroscopy. Irradiation leads to the reduction of both Cr and Mn ions in both types of glass matrix. It is shown that even small amounts of TM dopants completely block defect production, as occurs under irradiation in non-doped glasses. As well, TM doping results in the disappearance of structural changes in the glass (densification, polymerization increase and Na migration) for doses of ∼10<sup>9</sup>
 Gy. Unlike TM-doped matrices, incorporation of RE ions into aluminoborosilicate glass blocks neither defect production nor structural changes in glass matrices during irradiation. Simultaneously, we observe a reduction of RE ions, most clearly demonstrated for Ce<sup>4+</sup>
 ions in aluminoborosilicate glasses. We propose that the relative stability of the different charge states of the RE ions is linked to the efficiency of the reduction process, and therefore to the evolution of the glass structure during irradiation.</div>
</front>
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Irradiation effects in oxide glasses doped with transition and rare-earth elements

Irradiation effects in oxide glasses doped with transition and rare-earth elements

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