title: Comparison of EPR response of alanine and Gd₂O₃-alanine dosimeters exposed to TRIGA Mainz reactor.
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.
authors: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy; Gruppo V Sezione INFN, Via Santa Sofia, 64, 95123 Catania, Italy. Electronic address: maurizio.marrale@unipa.it.
authors: M
authors: M
authors: Marrale
authors: Institut für Kernchemie, Fritz Strassmann Weg 2, D-55128 Mainz, Germany.
authors: T
authors: T
authors: Schmitz
authors: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy; Gruppo V Sezione INFN, Via Santa Sofia, 64, 95123 Catania, Italy; PH3DRA Laboratories, Dipartimento di Fisica e Astronomia, Università di Catania Via Santa Sofia 64, 95123 Catania, Italy.
authors: S
authors: S
authors: Gallo
authors: Institut für Kernchemie, Fritz Strassmann Weg 2, D-55128 Mainz, Germany.
authors: G
authors: G
authors: Hampel
authors: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy; Gruppo V Sezione INFN, Via Santa Sofia, 64, 95123 Catania, Italy.
authors: A
authors: A
authors: Longo
authors: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy.
authors: S
authors: S
authors: Panzeca
authors: Laboratorio di Fisica e Tecnologie Relative - UNINETLAB, Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy.
authors: L
authors: L
authors: Tranchina
mesh_terms: D000409:Alanine / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005682:Gadolinium / Q000737:chemistry*; D006801:Humans; D011879:Radiotherapy Dosage
chemical_list: C030581:gadolinium oxide; D005682:Gadolinium; D000409:Alanine
keywords: Alanine; Electron spin resonance; Gadolinium; NCT dosimetry; Triga reactor Mainz