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MAURIZIO MARRALE

Monte Carlo simulation of the response of ESR dosimeters added with gadolinium exposed to thermal, epithermal and fast neutrons.

  • Autori: Marrale, M.; Basile, S.; Brai, M.; Longo, A.
  • Anno di pubblicazione: 2009
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • OA Link: http://hdl.handle.net/10447/36012

Abstract

MonteCarlonumericalcalculationsoftheresponseofalanineandammoniumtartrateESR(electron spin resonance)dosimetersexposedtoneutronfieldswithdifferentenergyspectraarereported.Results havebeenobtainedforvariousgadoliniumconcentrationsinsidethedosimeters.Furthermore,inorder to simulatethein-phantomresponsewehavecarriedoutcalculationsbyvaryingthedepthofthe dosimeter.Wehavefoundthatalargeenhancementisobtainedforthermalneutrons,becauseofthe very highcapturecrosssectionofgadoliniumtothermalneutrons.Agoodenhancementwasobtained for epithermalneutrons,whereasthesensitivityimprovementinthecaseoffastneutronirradiationis poor.Furthermore,thesimulationscarriedoutbyvaryingthedepthsuggeststhatanappreciable sensitivitytothermalandepithermalneutronscouldbeobservedforin-phantommeasurementsinthe 2–3cmdepthrange.Theseresultscanprovideusefulinsightforfutureexperimentswithepithermal neutronbeams(suchasthoseusedinneutroncapturetherapy)andforfutureapplicationsinneutron capturetherapydosimetry.