ISO/ASTM 51538-2002 酒精-氯苯剂量测定系统使用规程

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【英文标准名称】:Practiceforuseoftheethanol-chlorobenzenedosimetrysystem
【原文标准名称】:酒精-氯苯剂量测定系统使用规程
【标准号】:ISO/ASTM51538-2002
【标准状态】:作废
【国别】:国际
【发布日期】:2002-03
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC85
【标准类型】:()
【标准水平】:()
【中文主题词】:γ辐射;辐射测量;氯苯;酒精;电子束;核辐射;X射线;定义;放射量测定;电离辐射;辐射计量
【英文主题词】:Chlorobenzene;Definitions;Dosimetry;Electronbeams;Ethanol;Gamma-radiation;Ionizingradiation;Nuclearradiation;Radiationdose;Radiationmeasurement;X-rays
【摘要】:1Thispracticecoversthepreparation,handling,testing,andprocedureforusingtheethanol-chlorobenzenedosimetrysystemtomeasureabsorbeddoseinmaterialsirradiatedbyphotonsandelectronsintermsofabsorbeddoseinwater.Thesystemconsistsofadosimeterandappropriateanalyticalinstrumentation.Forsimplicity,thesystemwillbereferredtoastheECBsystem.Itisclassifiedasareference-standarddosimeterandisalsousedasaroutinedosimetrysystem(seeISO/ASTMGuide51261).2Thispracticedescribesthetitrationanalysisasastan-dardreadoutprocedurefortheECBdosimeter.Otherappli-cablereadoutmethods(spectrophotometric,oscillometric)aredescribedinAnnexAlandAnnexA2.3Thispracticeappliesonlytogammarays,Xrays,andhigh-energyelectrons.4Thispracticeappliesprovidedthefollowingaresatis-fied:4.1Theabsorbeddoserangeshallbefrom10Gyto2MGy(1).4.2Theabsorbeddoseratedoesnotexceed10Gys(2).4.3Forradionuclidegamma-raysources,theinitialpho-tonenergyshallbegreaterthan0.6MeV.Forbremsstrahlungphotons,theinitialenergyoftheelectronsusedtoproducethebremsstrahlungphotonsshallbeequaltoorgreaterthan2MeV.Forelectronbeams,theinitialelectronenergyshallbeequaltoorgreaterthan4MeV(3)(seeICRUReports34and35).Note1—Thelowerlimitsofelectromagneticradiationenergygivenareappropriateforacylindricaldosimeterampouleof12-mmdiameter.Correctionsfordosegradientsacrossanampouleofthatdiameterorlessarenotrequired.TheECBsystemmaybeusedatenergiesofincidentelectronslowerthan4MeVbyemployingthinner(inthebeamdirection)dosimetercontainers(seeICRUReport35).TheECBsystemmayalsobeusedatX-rayenergiesaslowas120kVp(4).Inthisrangeofphotonenergiestheeffectcausedbythewallisconsiderable.4.4Theirradiationtemperatureofthedosimetershouldbewithintherangefrom-40℃to80℃.Note2—Thetemperaturedependenceofdosimeterresponseisknownonlyinthisrange.Foruseoutsidethisrange,thedosimetrysystemshouldbecalibratedfortherequiredrangeofirradiationtemperatures.4.5Theeffectsofsizeandshapeoftheirradiationvesselontheresponseofthedosimetercanadequatelybetakenintoaccountbyperformingtheappropriatecalculationsusingcavitytheory(5).5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.note:2Theboldfacenumbersinparenthesesrefertothebibliographyattheendofthispractice.
【中国标准分类号】:F80
【国际标准分类号】:17_240
【页数】:10P;A4
【正文语种】:英语