Designation:E2450−11StandardPracticeforApplicationofCaF2(Mn)ThermoluminescenceDosimetersinMixedNeutron-PhotonEnvironments1ThisstandardisissuedunderthefixeddesignationE2450;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticedescribesaprocedureforcorrectingaCaF2(Mn)thermoluminescencedosimeter(TLD)readingforitsresponsetoneutronsduringtheirradiation.TheneutronresponsemaybesubtractedfromthetotalTLDresponsetogivethegamma-rayresponse.Infieldswithalargeneutroncontributiontothetotalresponse,thisproceduremayresultinlargeuncertainties.1.2Morepreciseexperimentaltechniquesmaybeappliediftheuncertaintyderivedfromthispracticeislargerthanthelevelthattheusercanaccept.Thesemoreprecisetechniquesarenotdiscussedhere.ThereferencesinSection8describesomeofthesetechniques.1.3ThispracticedoesnotdiscusseffectsontheTLDreadingfromneutroninteractionswiththematerialsurround-ingtheTLDandusedtoensureachargedparticleequilibrium.Theseeffectswilldependontheisotopiccompositionofthesurroundingmaterialanditsthickness,andontheincidentneutronspectrum(1).21.4ThevaluesstatedinSIunitsaretoberegardedasstandard.2.ReferencedDocuments2.1ASTMStandards:3E170TerminologyRelatingtoRadiationMeasurementsandDosimetryE666PracticeforCalculatingAbsorbedDoseFromGammaorXRadiationE668PracticeforApplicationofThermoluminescence-Dosimetry(TLD)SystemsforDeterminingAbsorbedDoseinRadiation-HardnessTestingofElectronicDevicesE720GuideforSelectionandUseofNeutronSensorsforDeterminingNeutronSpectraEmployedinRadiation-HardnessTestingofElectronicsE721GuideforDeterminingNeutronEnergySpectrafromNeutronSensorsforRadiation-HardnessTestingofElec-tronicsE722PracticeforCharacterizingNeutronFluenceSpectrainTermsofanEquivalentMonoenergeticNeutronFluenceforRadiation-HardnessTestingofElectronicsE1854PracticeforEnsuringTestC...
