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.

Marrale, M., Schmitz, T., Gallo, S., Hampel, G., Longo, A., Panzeca, S., et al. (2015). Comparison of EPR response of alanine and Gd2O3-alanine dosimeters exposed to TRIGA Mainz reactor. APPLIED RADIATION AND ISOTOPES, 106, 116-120 [10.1016/j.apradiso.2015.08.016].

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

MARRALE, Maurizio
Writing – Original Draft Preparation
;
GALLO, Salvatore
Investigation
;
LONGO, Anna
Visualization
;
PANZECA, Salvatore
Investigation
;
TRANCHINA, Luigi
Methodology
2015

Abstract

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.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore ING-IND/18 - Fisica Dei Reattori Nucleari
Settore ING-IND/20 - Misure E Strumentazione Nucleari
Marrale, M., Schmitz, T., Gallo, S., Hampel, G., Longo, A., Panzeca, S., et al. (2015). Comparison of EPR response of alanine and Gd2O3-alanine dosimeters exposed to TRIGA Mainz reactor. APPLIED RADIATION AND ISOTOPES, 106, 116-120 [10.1016/j.apradiso.2015.08.016].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/145074
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