6533b7dafe1ef96bd126ed4b

RESEARCH PRODUCT

EPR/ALANINE PELLETS WITH LOW Gd CONTENT FOR NEUTRON DOSIMETRY

Maurizio MarraleElio Angelo TomarchioAlberto ZeffiroLuigi TranchinaA. CarlinoAldo ParlatoMaria BraiDaniele DondiAnna LongoArmando ButtafavaSalvatore Panzeca

subject

inorganic chemicalsMaterials scienceGadoliniumAnalytical chemistrychemistry.chemical_elementGadoliniumRadiation Dosagelaw.inventionBoric acidchemistry.chemical_compoundBoric AcidsIsotopeslawRadiology Nuclear Medicine and imagingNeutronIrradiationBoronElectron paramagnetic resonanceRadiometryNeutronsRadiationAlanineRadiological and Ultrasound Technologybusiness.industryElectron paramagnetic resonance (EPR) alanine pellet gadolinium Monte Carlo (MC) simulation dosimetryDopingtechnology industry and agriculturePublic Health Environmental and Occupational HealthElectron Spin Resonance SpectroscopyGeneral MedicineNeutron temperatureSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)chemistryNuclear medicinebusinessMonte Carlo Method

description

This paper reports on results obtained by electron paramagnetic resonance (EPR) measurements and Monte Carlo (MC) simulation on a blend of alanine added with low content of gadolinium oxide (5 % by weight) to improve the sensitivity to thermal neutron without excessively affecting tissue equivalence. The sensitivity is enhanced by this doping procedure of more an order of magnitude. The results are compared with those obtained with the addition of boric acid (50 % by weight) where boron is in its natural isotopic composition in order to produce low-cost EPR dosemeters. The gadolinium addition influences neutron sensitivity more than the boron addition. The presence of additives does not substantially change the fading of the EPR signal induced by neutrons. The MC simulations agree the experimental results in case of gadolinium addition.

yearjournalcountryeditionlanguage
2013-11-23
10.1093/rpd/nct290http://hdl.handle.net/10447/98139