Identification of ESR centers and their role in the TL of natural salt from Lluta, Peru

Darwin J. Callo-Escobar, Nilo F. Cano, T. K. Gundu Rao, Carlos D. Gonzales-Lorenzo, Klinton V. Turpo-Huahuasoncco, Yolanda Pacompia, Monise B. Gomes, Jose F. Benavente, Jose F.D. Chubaci, Shigueo Watanabe, Jorge S. Ayala-Arenas

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In this study, the thermoluminescence (TL) properties of natural NaCl from Lluta, Arequipa-Peru was investigated. The number of peaks and the kinetic parameters associated with the TL glow peaks of NaCl sample after gamma-irradiation were analyzed by initial rise and deconvolution method. Defect centers induced in pure salt by gamma irradiation have been studied by electron spin resonance (ESR) with a view to identify the centers associated with the TL process in the salt. Thermal annealing experiments indicate the presence of three defect centers. Center I characterized by the g-value 2.011 is identified as an O ion and relates with the dominant TL peak at 220 °C. Center II with a g-value of 2.0058 is attributed to a F center and is found to correlate with the 128 °C TL peak. Center III has of g-value 2.014 and is also assigned to an O ion.

Original languageEnglish
Article number110126
JournalApplied Radiation and Isotopes
StatePublished - Apr 2022

Bibliographical note

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  • Defects centers
  • ESR
  • NaCl
  • Radiation effects
  • TL


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