Preparation and characterisation of a sol-gel process α-Al2O3 polycrystalline detector.
Radiat Prot Dosimetry
; 163(2): 166-72, 2015 Feb.
Article
em En
| MEDLINE
| ID: mdl-24795396
This article presents the dosimetric characteristics of α-Al2O3 detectors prepared through the sol-gel process, disc pressing and sintering in a highly reducing atmosphere. Comparative tests between the sol-gel process α-Al2O3 polycrystalline and anion-defective α-Al2O3:C single-crystal detectors indicate that the ones prepared through this approach present good dosimetric characteristics similar to those found in single-crystal detectors, such as a simple glow curve with the main peak at â¼198 °C (2 °C s(-1)), high sensitivity, a detection threshold of 1.7 µGy, linearity of response, low fading, relatively low photon energy dependence, reusability without annealing and good reproducibility. However, the undesirable feature of heating rate dependence of the thermoluminescence (TL) output in α-Al2O3:C single crystal is practically non-existent in the sol-gel process α-Al2O3 polycrystalline detector. This characteristic renders it useful for the routine processing of large numbers of personal and environmental dosemeters at higher heating rates and also when it comes to the proposal for new approaches to thermal quenching investigation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dosimetria Termoluminescente
/
Cristalização
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Óxido de Alumínio
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Idioma:
En
Revista:
Radiat Prot Dosimetry
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido