【英文标准名称】:StandardPracticeforUseoftheAlanine-EPRDosimetrySystem
【原文标准名称】:丙氨酸-EPR剂量测定系统使用的标准规程
【标准号】:ASTMISO/ASTM51607-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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;alaninedosimetry;dosemeasurements;dosimeter;dosimetrysystem;electronbeam;electronparamagneticresonance;electronspinresonance;EPRdosimeter;EPRdosimetry;ESRdosimeter;gammaradiation;ionizingradiation;irrad
【摘要】:4.1Thealanine-EPRdosimetrysystemprovidesameansformeasuringtheabsorbeddose.Itisbasedonthemeasurementofspecificstablefreeradicalsincrystallinealaninegeneratedbyionizingradiation.4.2Thedosimetercontainscrystallinealanineandregisterstheabsorbeddosebytheformationofalanine-derivedfreeradicals.Identificationandmeasurementofalanine-derivedfreeradicalsareperformedbyEPRspectroscopy.4.3ThemeasurementoffreeradicalsbyEPRspectroscopyisnondestructive.Alaninedosimeterscanbereadoutrepeatedlyandhencecanbeusedforarchivalpurposes.NOTE1-Foracomprehensivediscussionofvariousdosimetrymethodsandmaterialsapplicabletotheradiationtypesandenergiesdiscussedinthispractice,seeASTMPracticeE668,ISO/ASTMPractices51204,51400,51431,ISO/ASTMGuide51261,andICRUReports14,17,34,35,37,44and60.4.4Alanine-EPRdosimetrysystemsareusedasreferenceortransfer-standardorroutinedosimetrysystemsinradiationapplicationsthatinclude:sterilizationofmedicaldevicesandpharmaceuticals,foodirradiation,polymermodifications,medicaltherapyandradiationdamagestudiesinmaterials.4.5TheEPRsignalamplitudesofirradiatedalaninedosimetershavebeenshowntobeequivalentforphotonandelectronabsorbeddoses(4).1.1Thispracticecoversmaterialsdescription,dosimeterpreparation,instrumentation,andproceduresforusingthealanine-EPRdosimetrysystemformeasuringtheabsorbeddoseinthephotonandelectronirradiationprocessingofmaterials.Thesystemisbasedonelectronparamagneticresonance(EPR)spectroscopyoffreeradicalsderivedfromtheaminoacidalanine.Itisclassifiedasareference-standarddosimetrysystem(seeISO/ASTMGuide51261)).1.2Thispracticecoversalanine-EPRdosimetrysystemsfordosemeasurementsunderthefollowingconditions:1.2.1Theabsorbeddoserangeisbetween1and105Gy.1.2.2Theabsorbeddoserateisupto102Gys1forcontinuousradiationfieldsandupto5107Gys1forpulsedradiationfields().1.2.3Theradiationenergyforphotonsandelectronsisbetween0.1and28MeV(,,).1.2.4Theirradiationtemperatureisbetween60and+90176;C(,).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:17_240
【页数】:6P.;A4
【正文语种】:


【英文标准名称】:SpecificationforIndustrialWireClothandScreens(SquareOpeningSeries)
【原文标准名称】:工业用金属丝布及筛(方孔系列)规范
【标准号】:ANSI/ASTME437-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:筛分设备;金属;金属线
【英文主题词】:Cloth;Industrial;Metals;Openings;Screens;Sievingequipment;Square;Steelchains;Steel-wireropes;Wires
【摘要】:
【中国标准分类号】:Y72
【国际标准分类号】:77_140_65
【页数】:
【正文语种】:英语