Radiation effect on thermoluminescence and electron paramagnetic resonance (EPR) of pink beryl

Jorge Sabino Ayala Arenas, Reneu L. Andrioli, S. Watanabe, M. Matsuoka, B. C. Bhatt

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Morganite, a pink beryl with the chemical formula Be3Al2Si6O18, was investigated in terms of its thermally stimulated luminescence (TL) and electron paramagnetic resonance (EPR) properties due to point defects. Atomic hydrogen H°-centers were induced by γ-radiation and shown to be responsible for a 165°C TL peak. The Fe3+-center concentration was found to increase with γ-dose, observed by both TL and EPR measurements, decreasing with thermal treatments beyond 250°C. A mechanism for emission around 315°C is proposed.

Original languageEnglish
Pages (from-to)417-419
Number of pages3
JournalRadiation Physics and Chemistry
Volume61
Issue number3-6
DOIs
StatePublished - 2001
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by FAPESP and CNPq. We are thankful to Tec. Elizabeth S. Ribeiro and Carlos G. de Silveira, IPEN, for irradiation of the beryl samples.

Keywords

  • Beryl
  • EPR
  • Thermoluminescence

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