title: Testing and linearity calibration of films of phenol compounds exposed to thermal neutron field for EPR dosimetry.
abstract: This paper reports the preliminary results obtained by Electron Paramagnetic Resonance (EPR) measurements on films of IRGANOX® 1076 phenols with and without low content (5% by weight) of gadolinium oxide (Gd2O3) exposed in the thermal column of the Triga Mark II reactor of LENA (Laboratorio Energia Nucleare Applicata) of Pavia (Italy). Thanks to their size, the phenolic films here presented are good devices for the dosimetry of beams with high dose gradient and which require accurate knowledge of the precise dose delivered. The dependence of EPR signal as function of neutron dose was investigated in the fluence range between 10(11) cm(-2) and 10(14) cm(-2). Linearity of EPR response was found and the signal was compared with that of commercial alanine films. Our analysis showed that gadolinium oxide (5% by weight) can enhance the thermal neutron sensitivity more than 18 times. Irradiated dosimetric films of phenolic compound exhibited EPR signal fading of about 4% after 10 days from irradiation.
authors.affiliation: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, V.le delle Scienze, Ed.18, I-90128 Palermo, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Catania, Via Santa Sofia, 64, I-95123 Catania, Italy; PH3DRA Laboratories (PHysics for Dating Diagnostic Dosimetry Research and Applications), Dipartimento di Fisica e Astronomia, Università di Catania Via Santa Sofia 64, I-95123 Catania, Italy. Electronic address: salvatore.gallo05@unipa.it.
authors.forename: S
authors.initials: S
authors.lastname: Gallo
authors.affiliation: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, V.le delle Scienze, Ed.18, I-90128 Palermo, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Catania, Via Santa Sofia, 64, I-95123 Catania, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Panzeca
authors.affiliation: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, V.le delle Scienze, Ed.18, I-90128 Palermo, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Catania, Via Santa Sofia, 64, I-95123 Catania, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Longo
authors.affiliation: Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi, 6, I-27100 Pavia, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pavia, Via Agostino Bassi, 6, I-27100 Pavia, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Altieri
authors.affiliation: Dipartimento di Chimica, Università di Pavia, V.le Taramelli, 12, I-27100 Pavia, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Bentivoglio
authors.affiliation: Dipartimento di Chimica, Università di Pavia, V.le Taramelli, 12, I-27100 Pavia, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pavia, Via Agostino Bassi, 6, I-27100 Pavia, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Dondi
authors.affiliation: Dipartimento di Chimica, Università di Pavia, V.le Taramelli, 12, I-27100 Pavia, Italy.
authors.forename: R P
authors.initials: RP
authors.lastname: Marconi
authors.affiliation: Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi, 6, I-27100 Pavia, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pavia, Via Agostino Bassi, 6, I-27100 Pavia, Italy.
authors.forename: N
authors.initials: N
authors.lastname: Protti
authors.affiliation: Dipartimento di Chimica, Università di Pavia, V.le Taramelli, 12, I-27100 Pavia, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pavia, Via Agostino Bassi, 6, I-27100 Pavia, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Zeffiro
authors.affiliation: Dipartimento di Fisica e Chimica (DiFC), Università di Palermo, V.le delle Scienze, Ed.18, I-90128 Palermo, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Catania, Via Santa Sofia, 64, I-95123 Catania, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Marrale
mesh_terms: D002138:Calibration; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D009502:Neutrons; D010636:Phenols / Q000737:chemistry*
chemical_list: D010636:Phenols
keywords: Electron Paramagnetic Resonance; Gadolinium; NCT dosimetry; Neutron beam; Phenols