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.
Nota bibliográficaFunding 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 )”.