NF X90-006-3-2005 道路照明.第3部分:性能计算

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标准名称：	电子设备用电位器 第三部分:空白详细规范 旋转式精密电位器 评定水平E
中标分类：	电子元器件与信息技术 >> 电子元件 >> 电位器
替代情况：	被GB/T 15881-1995代替
发布日期：
实施日期：	2000-10-20
首发日期：
作废日期：	1996-08-01
出版日期：
页数：	16页

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【英文标准名称】:StandardPracticeforUseofCelluloseAcetateDosimetrySystems
【原文标准名称】:醋酸纤维素剂量测量系统应用的标准指南
【标准号】:ASTMISO/ASTM51650-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E10.01
【标准类型】:(ISO/ASTM)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorbeddose;CDA;celluloseacetatedosimeter;cellulosediacetatedosimeter;cellulosetriacetatedosimeter;CTA;dosedistribution;dosemapping;dosimeter;dosimetry;electronbeams;filmdosimeter;gamma-rays;routinedosimeter;ICS
【摘要】:4.1Thecellulosetriacetate(CTA)dosimetrysystemprovidesameansformeasuringabsorbeddoseinmaterials(2-15).Thedosimeterisafilmcontainingcellulosetriacetateandplasticizer.Thedosimetryisbasedonchemicalreactionsinthefilmresultinginchangesintheopticalabsorptionpropertiesinnearultravioletregion.Theabsorbanceismeasuredataspecificwavelengthusingaspectrophotometerorequivalentphotometricinstruments.4.2Absorbeddoseisevaluatedbyuseofacalibrationcurveorresponsefunctiontraceabletonationallyorinternationallyrecognizedstandards.4.3Absorbeddoseisusuallyspecifiedintermsofabsorbeddosetowater.AbsorbeddosetoothermaterialsmaybeevaluatedbyapplyingtheconversionfactorsdiscussedinISO/ASTMGuide51261.NOTE2-Foracomprehensivediscussionofvariousdosimetrymethodsapplicabletotheradiationtypesandenergiesdiscussedinthispractice,seeICRUReports14,17,34,35,and37.4.4Thisdosimetrysystemmaybeusedinindustrialradiationprocessingofvariousproducts,forexampleradiationeffecttests,polymermodifications,andsterilizationofmedicaldevices.4.5Aone-dimensionalabsorbed-dosemappingonorwithinaproductmaybeobtainedbyirradiatingadosimeterstripofappropriatelength.4.6Theabsorbed-doserangeindicatedin1.2.1maybeachievedbyusingtriphenylphosphate(TPP)asthesoleplasticizerinthedosimeter.4.7Theeffectonthedosimeterresponseduetochangesintheirradiationconditions,suchasabsorbed-doserate,temperature,humidity,andatmosphereshouldbeconsideredwhenthesearedifferentfromthecalibrationconditions.4.7.1Thedosimeterhasdifferentresponsestoelectronbeamsatrelativelyhighdoseratesthantogammaradiationatrelativelylowdoserates(seeFig.1).Calibrationshouldbecarriedoutseparatelyforeachtypeofradiation.4.7.2Thedosimeterresponseincreaseslinearlywithtemperaturefrom-10to60癈at7kGy/h,andfrom-10to40癈at1.2kGy/h(7),andwithrelativehumidity(upto80%)duringirradiationwhenirradiatedatlowerdoserates(100kGy/h).Alltheseeffectsneedtobeconsideredbeforethedosimetercanbeusedroutinelyforprocessing(4,7,12,15).Forhigh-dose-ratedosimetry(forexample,electronbeams)theinfluenceofhumidityondosimeterresponseisnotappreciable(4,7).Forotherconditionsitisrecommendedtocalibratethedosimetrysystembythefinaluserunderspecificenvironmentalconditions.1.1Thispracticecoversproceduresforusingthecellulosetriacetate(CTA)dosimetrysystemformeasuringabsorbeddoseanddoseprofileinmaterialsirradiatedbyelectronsandphotonsintermsofabsorbeddosetowater.TheCTAdosimeterisaroutinedosimeterespeciallyusefulformeasurementofdosedistribution.Note1Cellulosetriacetatedosimeterreferstountintedfilmdosimeter.1.2Thispracticeappliesprovidedthefollowingconditionsaresatisfied.1.2.1Theabsorbed-doserangeis10kGyto300kGyforelectronsandphotons.1.2.2Theabsorbed-doseraterangeis3Gy/sto41010Gy/s().1.2.3Theradiation-energyrangeforelectronsis0.2to50MeV.1.2.4Theradiation-energyrangeforphotonsis0.1to50MeV.1.2.5Theirradiation-temperaturerangeofthedosimeteris-10to70C.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:
【页数】:7P.;A4
【正文语种】:英语