Study of the response of phenol compounds exposed to thermal neutrons beams for Electron Paramagnetic Resonance dosimetry

Anna Longo, Aldo Parlato, Salvatore Gallo, Maurizio Marrale, Marrale, Longo, Zeffiro, Salvatore Gallo, Buttafava, Dondi, Salvatore Panzeca

Risultato della ricerca: Articlepeer review

16 Citazioni (Scopus)

Abstract

This paper reports the results regarding a new organic compound (IRGANOX 1076 phenols) with and without low content (5% by weight) of gadolinium oxide (Gd2O3) for Electron Paramagnetic Resonance (EPR) dosimetry of neutron beams. The dependence of EPR signal as function of neutron dose was investigated in the fluence range studied between 10^11 cm-2 to 10^14 cm-2.We evaluated also the effect of gadolinium on 60Co gamma photon sensitivity of this organic compound. Our analysis showed that a low concentration of gadolinium oxide (of the order of 5% of the total mass of the dosimeter) can enhance the thermal neutron sensitivity more than 10 times with a small reduction of photon tissue equivalence. The free radicals produced after irradiation of photons and neutrons are stable for more than first 300 h after irradiation. The presence of additives does not substantially modify the fading of the EPR signal induced by photons and neutrons in the first 15 days after exposure.
Lingua originaleEnglish
pagine (da-a)15-20
Numero di pagine6
RivistaRadiation Measurements
Volume75
Stato di pubblicazionePublished - 2015

All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation

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