1、ISO/ASTM 51607:2013(E)An American National StandardStandard Practice forUse of an Alanine-EPR Dosimetry System1This standard is issued under the fixed designation ISO/ASTM 51607;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the yea
2、r of last revision.1.Scope1.1 This practice covers dosimeter materials,instrumenta-tion,and procedures for using the alanine-EPR dosimetrysystem for measuring the absorbed dose in the photon andelectron radiation processing of materials.The system is basedon electron paramagnetic resonance(EPR)spect
3、roscopy offree radicals derived from the amino acid alanine.21.2 The alanine dosimeter is classified as a type I dosimeteras it is affected by individual influence quantities in a well-defined way that can be expressed in terms of independentcorrection factors(see ASTM Practice E2628).The alaninedos
4、imeter may be used in either a reference standard dosimetrysystem or in a routine dosimetry system.1.3 This document is one of a set of standards that providesrecommendations for properly implementing dosimetry inradiation processing,and describes a means of achievingcompliance with the requirements
5、 of ASTM E2628“Practicefor Dosimetry in Radiation Processing”for alanine dosimetrysystem.It should be read in conjunction with ASTM E2628.1.4 This practice covers alanine-EPR dosimetry systems fordose measurements under the following conditions:1.4.1 The absorbed dose range is between 1 and 1.5 3105
6、Gy.1.4.2 The absorbed dose rate is up to 102Gy s-1for continu-ous radiation fields and up to 3 3 1010Gy s-1for pulsedradiation fields(1-4).31.4.3 The radiation energy for photons and electrons isbetween 0.1 and 30 MeV(1,2,5-8).1.4.4 The irradiation temperature is between 78 C and+70 C(2,9-12).1.5 Th
7、is standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced documents2.
8、1 ASTM Standards:4E170 Terminology Relating to Radiation Measurements andDosimetryE2628 Practice for Dosimetry in Radiation ProcessingE2701 Guide for Performance Characterization of Dosim-eters and Dosimetry Systems for Use in Radiation Process-ing2.2ISO/ASTM Standards:451261 Practice for Calibratio
9、n of Routine Dosimetry Sys-tems for Radiation Processing51707 Guide for Estimating Uncertainties in Dosimetry forRadiation Processing2.3ICRU Reports:5ICRU Report 85a Fundamental Quantities and Units forIonizing RadiationICRU Report 80 Dosimetry Systems for Use in RadiationProcessing2.4Joint Committe
10、e for Guides in Metrology(JCGM)Reports:JCGM 100:2008,GUM 1995,with minor corrections,Evaluation of measurement data Guide to the Expres-sion of Uncertainty in Measurement6JCGM 100:2008,VIM,International vocabulary of metrol-ogy Basis and general concepts and associated terms73.Terminology3.1 Definit
11、ions:3.1.1 alanine dosimeterspecified quantity and physicalform of the radiation-sensitive material alanine and any addedinert substance such as a binder.3.1.2 alanine-EPR dosimetry systemsystem used for de-termining absorbed dose,consisting of alanine dosimeters,anEPR spectrometer and its associate
12、d reference materials,andprocedures for the systems use.1This practice is under the jurisdiction of ASTM Committee E61 on RadiationProcessing and is the direct responsibility of Subcommittee E61.02 on DosimetrySystems,and is also under the jurisdiction of ISO/TC 85/WG 3.Current edition approved Apri
13、l 9,2013.Published June 2013.Originallypublished as ASTM E 1607 94.Last previous ASTM edition E 1607 961.ASTM E 1607 94 was adopted by ISO in 1998 with the intermediate designationISO 15566:1998(E).The present International Standard ISO/ASTM 51607:2013(E)replaces ISO 15566 and is a major revision of
14、 the last previous edition ISO/ASTM516072004(E).2The term“electron spin resonance”(ESR)is used interchangeably withelectron paramagnetic resonance(EPR).3The boldface numbers in parentheses refer to the bibliography at the end of thisstandard.4For referenced ASTM and ISO/ASTM standards,visit the ASTM
15、 website,www.astm.org,or contact ASTM Customer Service at serviceastm.org.ForAnnual Book of ASTM Standards volume information,refer to the standardsDocument Summary page on the ASTM website.5Available from International Commission on Radiation Units and Measure-ments,7910 Woodmont Ave.,Suite 800,Bet
16、hesda,MD 20814,U.S.A.6Document produced by Working Group 1 of the Joint Committee for Guides inMetrology(JCGM/WG 1).Available free of charge at the BIPM website(http:/www.bipm.org).7Document produced by Working Group 2 of the Joint Committee for Guides inMetrology(JCGM/WG 2).Available free of charge at the BIPM website(http:/www.bipm.org).1 ISO/ASTM International 2013 All rights reserved3.1.3 alanine-EPR dosimeter responsevalue resultingfrom applied adjustments to the EPR signal amplitude.3.1.4
