1、Designation:E 1026 04e1An American National StandardStandard Practice forUsing the Fricke Reference-Standard Dosimetry System1This standard is issued under the fixed designation E 1026;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,
2、the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.e1NOTEEquations 3 and 4 were corrected editorially in August 2005.1.Scope1.1 This practice covers the procedures for prep
3、aration,testing and using the acidic aqueous ferrous ammonium sulfatesolution dosimetry system to measure absorbed dose to waterwhen exposed to ionizing radiation.The system consists of adosimeter and appropriate analytical instrumentation.Thesystem will be referred to as the Fricke system.It is cla
4、ssifiedas a reference-standard dosimetry system(see ISO/ASTM51261).1.2 The practice describes the spectrophotometric analysisprocedures for the Fricke dosimeter.1.3 This practice applies only to gamma rays,x-rays(bremsstrahlung),and high-energy electrons.1.4 This practice applies provided the follow
5、ing are satis-fied:1.4.1 The absorbed dose range shall be from 20 to 400 Gy(1).21.4.2 The absorbed-dose rate does not exceed 106Gys1(2).1.4.3 For radioisotope gamma-ray sources,the initial pho-ton energy is greater than 0.6 MeV.For x-rays(bremsstrahl-ung),the initial energy of the electrons used to
6、produce thephotons is equal to or greater than 2 MeV.For electron beams,the initial electron energy is greater than 8 MeV(see ICRUReports 34 and 35).NOTE1The lower energy limits given are appropriate for a cylindri-cal dosimeter ampoule of 12-mm outside diameter.Corrections for dosegradients across
7、an ampoule of that diameter or less are not required.1.4.4 The irradiation temperature of the dosimeter should bewithin the range of 10 to 60C.1.5 This 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 t
8、o establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3C 912 Practice for Designing a Process for Cleaning Tech-nical GlassesD 1193 Specification for Reagent WaterE 170 Terminology Relatin
9、g to Radiation Measurementsand DosimetryE 178 Practice for Dealing with Outlying ObservationsE 275 Practice for Describing and Measuring Performanceof Ultraviolet,Visible,and Near Infrared Spectrophotom-etersE 666 Practice for CalculatingAbsorbed Dose from Gammaor X-RadiationE 668 Practice for Appli
10、cation of Thermoluminescence-Dosimetry(TLD)Systems for DeterminingAbsorbed Dosein Radiation-Hardness Testing of Electronic DevicesE 925 Practice for the Periodic Calibration of Narrow Band-Pass SpectrophotometersE 958 Practice for Measuring Practical Spectral Bandwidthof Ultraviolet-Visible Spectrop
11、hotometers2.2ISO/ASTM Standards:ISO/ASTM 51205 Method for Using the Ceric-Cerous Sul-fate Dosimetry SystemISO/ASTM 51261 Guide for Selection and Calibration ofDosimetry Systems for Radiation ProcessingISO/ASTM 51707 Estimating Uncertainties in Dosimetryfor Radiation Processing2.3International Commis
12、sion on Radiation Units andMeasurements(ICRU)Reports:ICRU Report 34 The Dosimetry of Pulsed Radiation4ICRU Report 35 Radiation Dosimetry:Electrons with Ini-tial Energies Between 1 and 50 MeV4ICRU Report 60 Fundamental Quantities and Units forIonizing Radiation4ICRU Report 64 Dosimetry of High-Energy
13、 Photon Beamsbased on Standards of Absorbed Dose to Water41This practice is under the jurisdiction of ASTM Committee E10 on NuclearTechnology and Applications and is the direct responsibility of SubcommitteeE10.01 on Dosimetry for Radiation Processing.Current edition approved Jan.1,2004.Published Fe
14、bruary 2004.Originallyapproved in 1984.Last previous edition approved in 2003 as E 1026 03.2The boldface numbers that appear in parentheses refer to a list of references atthe end of this practice.3For referenced ASTM standards,visit the ASTM webiste,www.astm.org,orcontact ASTM Customer Service at s
15、erviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from the International Commission on Radiation Units and Measure-ments(ICRU),7910 Woodmont Ave.,Suite 800,Bethesda,MD 20814.1Copyright ASTM International,100
16、Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Copyright by ASTM Intl(all rights reserved);Reproduction authorized per License Agreement with Kathe Hooper(ASTMIHS Account);Mon Aug 15 13:44:07 EDT 2005Copyright ASTM International Provided by IHS under license with ASTM Licensee=Committee on Institutional Cooperation/5967164001 Not for Resale,02/21/2012 00:00:02 MSTNo reproduction or networking permitted without license from IHS-,-,-2.4National Research Council Canada(
