6533b85efe1ef96bd12bf3c4

RESEARCH PRODUCT

Comparison of EPR response of alanine and Gd2O3-alanine dosimeters exposed to TRIGA Mainz reactor.

Anna LongoMaurizio MarraleT SchmitzLuigi TranchinaSalvatore GalloSalvatore PanzecaG Hampel

subject

AlanineRadiationAlanineChemistrySettore ING-IND/18 - Fisica Dei Reattori NucleariSettore ING-IND/20 - Misure E Strumentazione NucleariGadoliniumRadiochemistrySettore FIS/01 - Fisica SperimentalePelletschemistry.chemical_elementGadoliniumNeutron radiationequipment and suppliesNeutron temperatureSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)law.inventionNCT dosimetrylawElectron spin resonanceNeutronTriga reactor MainzIrradiationElectron paramagnetic resonanceNuclear chemistry

description

In this work we report some preliminary results regarding the analysis of electron paramagnetic resonance (EPR) response of alanine pellets and alanine pellets added with gadolinium used for dosimetry at the TRIGA research reactor in Mainz, Germany. Two set-ups were evaluated: irradiation inside PMMA phantom and irradiation inside boric acid phantom. We observed that the presence of Gd2O3 inside alanine pellets increases the EPR signal by a factor of 3.45 and 1.24 in case of PMMA and boric acid phantoms, respectively. We can conclude that in the case of neutron beam with a predominant thermal neutron component the addition of gadolinium oxide can significantly improve neutron sensitivity of alanine pellets. Monte Carlo (MC) simulations of both response of alanine and Gd-added alanine pellets with FLUKA code were performed and a good agreement was achieved for pure alanine dosimeters. For Gd2O3-alanine deviations between MC simulations and experimental data were observed and discussed.

10.1016/j.apradiso.2015.08.016http://hdl.handle.net/10447/145074