ThuliumV1, Main, Exploration, bibRecord, 000B16

Thermoluminescence of aluminum oxide co-doped with terbium and thulium obtained via combustion synthesis

Identifieur interne : 000B16 ( Main/Exploration ); précédent : 000B15; suivant : 000B17

Thermoluminescence of aluminum oxide co-doped with terbium and thulium obtained via combustion synthesis

Auteurs : M. E. A. Andrade [Brésil] ; W. M. Azevedo [Brésil] ; V. S. M. Barros [Brésil] ; H. J. Khoury [Brésil]

Source :

Radiation measurements [ 1350-4487 ] ; 2011.

RBID : Pascal:12-0057727

Descripteurs français

Pascal (Inist)
- Thermoluminescence, Alumine, Terbium, Thulium, Combustion, Synthèse, Mixage, Aluminium, Nitrate, Urée, Basse température, Co 60, Rayonnement, Concentration, Matériau, Terre rare.
Wicri :
- topic : Aluminium.

English descriptors

KwdEn :
- Co-60, alumina, aluminum, combustion, concentration, low temperature, materials, mixing, nitrates, radiation, rare earths, synthesis, terbium, thermoluminescence, thulium, urea.

Abstract

In this work thermoluminescent properties of α-Al₂O₃ samples doped with Tb³⁺ and Tm³⁺, prepared by the combustion synthesis route, were studied. Samples were prepared by mixing stoichiometric amounts of aluminum nitrate, urea and dopants with different amounts of terbium and thulium nitrates varying from 0 to 0.15 mol%. The mixture was ignited in a muffle furnace at low temperature (500 °C). After the combustion, the samples were sintered at 1400 _°C for 4 h in order to obtain the pure α-phase crystalline structure. The TL response of these samples for Co-60 gamma radiation was evaluated. It was observed a TL glow peak around 220 °C and a linear response for doses in studied range of 0.1-1 Gy. It was observed that the 0.1 mol% concentrations of both dopants present the highest TL sensitivity. The sensitivity of the co-doped (0.10 mol%) samples is 5 times higher than the 0.1 mol% Tm-only doped Al₂O₃ and 40 times higher than the sample doped only with 0.1 mol% of Tb. These results strongly suggest that the Al₂O₃:Tm-Tb, prepared through the combustion method, is a potential material for TL radiation dosimetry.

Affiliations:

Brésil

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Le document en format XML

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<term>combustion</term>
<term>concentration</term>
<term>low temperature</term>
<term>materials</term>
<term>mixing</term>
<term>nitrates</term>
<term>radiation</term>
<term>rare earths</term>
<term>synthesis</term>
<term>terbium</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Thermoluminescence</term>
<term>Alumine</term>
<term>Terbium</term>
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<term>Synthèse</term>
<term>Mixage</term>
<term>Aluminium</term>
<term>Nitrate</term>
<term>Urée</term>
<term>Basse température</term>
<term>Co 60</term>
<term>Rayonnement</term>
<term>Concentration</term>
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<front><div type="abstract" xml:lang="en">In this work thermoluminescent properties of α-Al<sub>2</sub>
O<sub>3</sub>
 samples doped with Tb<sup>3+</sup>
 and Tm<sup>3+</sup>
, prepared by the combustion synthesis route, were studied. Samples were prepared by mixing stoichiometric amounts of aluminum nitrate, urea and dopants with different amounts of terbium and thulium nitrates varying from 0 to 0.15 mol%. The mixture was ignited in a muffle furnace at low temperature (500 °C). After the combustion, the samples were sintered at 1400 <sub>°</sub>
C for 4 h in order to obtain the pure α-phase crystalline structure. The TL response of these samples for Co-60 gamma radiation was evaluated. It was observed a TL glow peak around 220 °C and a linear response for doses in studied range of 0.1-1 Gy. It was observed that the 0.1 mol% concentrations of both dopants present the highest TL sensitivity. The sensitivity of the co-doped (0.10 mol%) samples is 5 times higher than the 0.1 mol% Tm-only doped Al<sub>2</sub>
O<sub>3</sub>
 and 40 times higher than the sample doped only with 0.1 mol% of Tb. These results strongly suggest that the Al<sub>2</sub>
O<sub>3</sub>
:Tm-Tb, prepared through the combustion method, is a potential material for TL radiation dosimetry.</div>
</front>
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<tree><country name="Brésil"><noRegion><name sortKey="Andrade, M E A" sort="Andrade, M E A" uniqKey="Andrade M" first="M. E. A." last="Andrade">M. E. A. Andrade</name>
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<name sortKey="Azevedo, W M" sort="Azevedo, W M" uniqKey="Azevedo W" first="W. M." last="Azevedo">W. M. Azevedo</name>
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<name sortKey="Khoury, H J" sort="Khoury, H J" uniqKey="Khoury H" first="H. J." last="Khoury">H. J. Khoury</name>
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Thermoluminescence of aluminum oxide co-doped with terbium and thulium obtained via combustion synthesis

Thermoluminescence of aluminum oxide co-doped with terbium and thulium obtained via combustion synthesis

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