Mechanisms of TL for production of the 230 °c peak in natural sodalite

Nilo F. Cano, Ana R. Blak, Jorge Sabino Ayala Arenas, Shigueo Watanabe

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4 Scopus citations


The thermoluminescence (TL) peak in natural sodalite near 230 °C, which appears only after submitted to thermal treatments and to gamma irradiation, has been studied in parallel with electron paramagnetic resonance (EPR) spectrum appearing under the same procedure. This study revealed a full correlation between the 230 °C TL peak and the eleven hyperfine lines from EPR spectrum. In both case, the centers disappear at the same temperature and are restored after gamma irradiation. A complete model for the 230 °C TL peak is presented and discussed. In addition to the correlation and TL model, specific characteristics of the TL peaks are described.

Original languageEnglish
Pages (from-to)165-168
Number of pages4
JournalJournal of Luminescence
Issue number2
StatePublished - Feb 2011

Bibliographical note

Funding Information:
The authors wish to thank Ms. E. Somessari and Mr. C. Gaia, from the Instituto de Pesquisas Energeticas e Nucleares (IPEN), São Paulo, Brazil, for kindly carrying out the irradiation of the samples. This work was carried out with financial support from ‘‘ Fundação de Amparo à Pesquisa do Estado de São Paulo—FAPESP (Process no. 2007/08008-0 )”.


  • EPR
  • Silicates
  • Sodalite
  • Thermoluminescence


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