ANSI/ASTM D3649-1998 水的高分辨率γ射线能谱测定方法

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【英文标准名称】:TestMethodforHigh-ResolutionGamma-RaySpectrometryofWater
【原文标准名称】:水的高分辨率γ射线能谱测定方法
【标准号】:ANSI/ASTMD3649-1998
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:γ辐射;水;放射性
【英文主题词】:water;gamma-radiation;radioactivity
【摘要】:Thispracticecoversthemeasurementofgamma-rayemittingradionuclidesinwaterbymeansofgamma-rayspectrometry.Itisapplicabletonuclidesemittinggamma-rayswithenergiesgreaterthan45keV.Fortypicalcountingsystemsandsampletypes,activitylevelsofabout40Bqareeasilymeasuredandsensitivitiesaslowas0.4Bqarefoundformanynuclides.Countratesinexcessof2000countspersecondshouldbeavoidedbecauseofelectroniclimitations.Highcountratesamplescanbeaccommodatedbydilution,byincreasingthesampletodetectordistance,orbyusingdigitalsignalprocessors.Thispracticecanbeusedforeitherquantitativeorrelativedeterminations.Inrelativecountingwork,theresultsmaybeexpressedbycomparisonwithaninitialconcentrationofagivennuclidewhichistakenas100%.Forquantitativemeasurements,theresultsmaybeexpressedintermsofknownnuclidicstandardsfortheradionuclidesknowntobepresent.Thispracticecanalsobeusedjustfortheidentificationofgamma-rayemittingradionuclidesinasamplewithoutquantifyingthem.Generalinformationonradioactivityandthemeasurementofradiationhasbeenpublished(1,2).Informationonspecificapplicationofgammaspectrometryisalsoavailableintheliterature(3-5).SeealsothereferencedASTMStandardsin2.1andtherelatedmaterialsectionattheendofthisstandard.Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationpriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:71_040_50
【页数】:
【正文语种】:英语