Thermoluminescence (TL) and electron paramagnetic resonance (EPR) of dumortierite sensitized by heat treatments
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Physica B: Condensed Matter
Exportar
Resumo
The present study presents the effect of heat treatment on TL and EPR of dumortierite. It was found that applying
a heat treatment at 1200 ◦C for 1h, followed by slow cooling to room temperature, is optimal for improving its TL
sensitivity. The glow curves of the sensitized dumortierite sample show TL emission bands centered at 350, 475,
and 580 nm. The kinetic parameters of the TL peaks were obtained using the Tm-Tstop and deconvolution
methods. In addition, sensitized dumortierite exhibits a linear response with γ-radiation dose and low fading in
its TL response. Studies using the technique of EPR were carried out to investigate the defect center EPR signals
observed after γ-irradiation. A single defect center with an axially symmetric g-tensor was observed with principal values g‖ = 2.0009 and g⊥ = 2.0017. The center was attributed to an F+ center and appears to correlate with
the TL peak at 200 ◦C.
Como referenciar
SILVA-CARRERA; RAO, T.K.G.; LOPEZ-FLORES, BETZABETH J.; AYALA-ARENAS, JORGE S.; ROCCA, RENE R.; CHUBACI, JOSE F.D.; CHUBACI, JOSE F.D.; CANO, NILO F. Thermoluminescence (TL) and electron paramagnetic resonance (EPR) of dumortierite sensitized by heat treatments. Physica B: Condensed Matter, v. 680, p. 1-7, 2024. DOI: 10.1016/j.physb.2024.415836. Disponível em: https://repositorio.ipen.br/handle/123456789/48130. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.