EPR response of anhydrite crystal (CaSO4) for dosimetry of gamma photon beams

Nilo F. Cano, T. K. Gundu Rao, Jorge Sabino Ayala Arenas, Henry S. Javier-Ccallata, S. Watanabe

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2 Scopus citations

Abstract

An anhydrite (CaSO4) natural sample was studied as possible dosimeter for low and high gamma doses using the technique of electron paramagnetic resonance (EPR). EPR spectrum showed signals due to (SO3)-, (SO4)- radicals and O- center. The anhydrite sample was irradiated with gamma rays with low-dose ranges typical for medical therapy (1–20 Gy) up to high-dose of about 70 kGy. The EPR centers due to (SO3)- and (SO4)- exhibited a linear dose response in the dose range from 1 Gy to 500 Gy, whilst the O- center presented a supra-linear dose response in the range of 50 to 5 kGy.

Original languageEnglish
Article number109231
JournalRadiation Physics and Chemistry
Volume180
DOIs
StatePublished - Mar 2021

Bibliographical note

Funding Information:
The authors would like to express thanks to Ms. E. Somessari from the Institute for Energy and Nuclear Researches (IPEN), Brazil, for kindly carrying out the ? irradiation of the samples. This work was carried out with partial financial support from FAPESP (Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo), Brazil (Process number 2014/03085-0). This work was partially supported by CONCYTEC-FONDECYT, Peru, in the framework of the call E038-01 (Process number 037-2019).

Funding Information:
The authors would like to express thanks to Ms. E. Somessari from the Institute for Energy and Nuclear Researches (IPEN), Brazil, for kindly carrying out the γ irradiation of the samples. This work was carried out with partial financial support from FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo), Brazil (Process number 2014/03085-0). This work was partially supported by CONCYTEC - FONDECYT , Peru, in the framework of the call E038-01 (Process number 037-2019).

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • Anhydrite (CaSO)
  • EPR
  • Radiation dosimetry

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