【英文标准名称】:Practiceforuseofadichromatedosimetrysystem
【原文标准名称】:重铬酸盐剂量测定系统的使用规程
【标准号】:ISO/ASTM51401-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-07-15
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC85
【标准类型】:()
【标准水平】:()
【中文主题词】:辐照剂量;辐射测量;γ辐射;电子束;剂量测定;重铬酸盐;核辐射;X射线;电离辐射;定义
【英文主题词】:radiationdose;definitions;radiationmeasurement;gamma-radiation;dichromates;nuclearradiation;electronbeams;ionizingradiation;definition;dosimetry;x-rays
【摘要】:1Thispracticecoversthepreparation,testing,andproce-dureforusingtheacidicaqueoussilverdichromatedosimetrysystemtomeasureabsorbeddoseinwaterwhenexposedtoionizingradiation.Thesystemconsistsofadosimeterandappropriateanalyticalinstrumentation.Forsimplicity,thesys-temwillbereferredtoasthedichromatesystem.Itisclassifiedasareferencestandarddosimetrysystem(seeISO/ASTMGuide51261).2Thispracticedescribesthespectrophotometricanalysisproceduresforthedichromatesystem.3Thispracticeappliesonlytoγ-rays,x-rays/bremsstrahlung,andhighenergyelectrons.4Thispracticeappliesprovidedthefollowingconditionsaresatisfied:4.1Theabsorbeddoserangeisfrom2×10to5×10Gy.4.2Theabsorbeddoseratedoesnotexceed600Gy/pulse(12.5pulsespersecond),ordoesnotexceedanequivalentdoserateof7.5kGy/sfromcontinuoussources(1).4.3Forradionuclidegamma-raysources,theinitialpho-tonenergyshallbegreaterthan0.6MeV.Forbremsstrahlungphotons,theinitialenergyoftheelectronsusedtoproducethebremsstrahlungphotonsshallbeequaltoorgreaterthan2MeV.Forelectronbeams,theinitialelectronenergyshallbegreaterthan8MeV.Note1—Thelowerenergylimitsgivenareappropriateforacylindri-caldosimeterampouleof12mmdiameter.Correctionsfordisplacementeffectsanddosegradientacrosstheampoulemayberequiredforelectronbeams(2).Thedichromatesystemmaybeusedatlowerenergiesbyemployingthinner(inthebeamdirection)dosimetercontainers(seeICRUReport35).4.4Theirradiationtemperatureofthedosimetershallbeabove0℃andshouldbebelow80℃.Note2—Thetemperaturecoefficientofdosimeterresponseisknownonlyintherangeof5°to50℃(see4.3).Useoutsidethisrangerequiresdeterminationofthetemperaturecoefficient.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregivenin8.3.note:2Theboldfacenumbersinparenthesesrefertothebibliographyattheendofthispractice.
【中国标准分类号】:F80
【国际标准分类号】:17_240
【页数】:11P.;A4
【正文语种】:英语


【英文标准名称】:Dentistry-Graphicalsymbolsfordentalinstruments(ISO21531:2009);EnglishversionofDINENISO21531:2009-08
【原文标准名称】:牙科.牙科器械的图形符号(ISO21531:2009),DINENISO21531:2009-08的英文版本
【标准号】:ENISO21531-2009
【标准状态】:现行
【国别】:
【发布日期】:2009-08
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:牙科器械;牙科学;名称与符号;图形符号;图形符号;尺寸;规范(验收);符号;术语
【英文主题词】:Dentalinstruments;Dentistry;Designations;Graphicsymbols;Pictographs;Size;Specification(approval);Symbols;Terms
【摘要】:
【中国标准分类号】:C33
【国际标准分类号】:01_080_20;01_080_99;11_060_01
【页数】:19P.;A4
【正文语种】:英语