ASTM E1026-04e1
Historical Standard: ASTM E1026-04e1 Standard Practice for Using the Fricke Reference-Standard Dosimetry System
SUPERSEDED (see Active link, below)
ASTM E1026
1. Scope
1.1 This practice covers the procedures for preparation, testing and using the acidic aqueous ferrous ammonium sulfate solution dosimetry system to measure absorbed dose to water when exposed to ionizing radiation. The system consists of a dosimeter and appropriate analytical instrumentation. The system will be referred to as the Fricke system. It is classified as a reference-standard dosimetry system (see ISO/ASTM 51261).
1.2 The practice describes the spectrophotometric analysis procedures 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 following are satisfied:
1.4.1 The absorbed dose range shall be from 20 to 400 Gy (1) .
1.4.2 The absorbed-dose rate does not exceed 10 6 Gys 1 (2) .
1.4.3 For radioisotope gamma-ray sources, the initial photon energy is greater than 0.6 MeV. For x-rays (bremsstrahlung), the initial energy of the electrons used to produce the photons is equal to or greater than 2 MeV. For electron beams, the initial electron energy is greater than 8 MeV (see ICRU Reports 34 and 35).
Note 1The lower energy limits given are appropriate for a cylindrical dosimeter ampoule of 12-mm outside diameter. Corrections for dose gradients across an ampoule of that diameter or less are not required.
1.4.4 The irradiation temperature of the dosimeter should be within the range of 10 to 60C.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Joint Committee for Guides in Metrology (JCGM) Reports
JCGM 100:2008 GUM 19 , with minor corrections, Evaluation of measurement data - Guide to the Expression of Uncertainty in MeasurementISO/ASTM Standards
ISO/ASTM 51261 Practice for Calibration of Routine Dosimetry Systems for Radiation Processing
ISO/ASTM 51707 Guide for Estimating Uncertainties in Dosimetry for Radiation Processing
ASTM Standards
C912 Practice for Designing a Process for Cleaning Technical Glasses
E170 Terminology Relating to Radiation Measurements and Dosimetry
E178 Practice for Dealing With Outlying Observations
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
E666 Practice for Calculating Absorbed Dose From Gamma or X Radiation
E668 Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose in Radiation-Hardness Testing of Electronic Devices
E925 Practice for Monitoring the Calibration of Ultraviolet-Visible Spectrophotometers whose Spectral Bandwidth does not Exceed 2 nm
E958 Practice for Estimation of the Spectral Bandwidth of Ultraviolet-Visible Spectrophotometers
E2628 Practice for Dosimetry in Radiation Processing
International Commission on Radiation Units and Measurements (ICRU) Reports
ICRU Report 14 Radiation Dosimetry: X Rays and Gamma Rays with Maximum Photon Energies Between 0.6 and 50 MeV ICRU Report 35 Radiation Dosimetry: Electrons with Initial Energies Between 1 and 50 MeV ICRU Report 64 Dosimetry of High-Energy Photon Beams based on Standards of Absorbed Dose to Water ICRU Report 80 Dosimetry Systems for Use in Radiation Processing ICRU Report 85a Fundamental Quantities and Units for Ionizing RadiationISO/IEC Standard
ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.National Research Council Canada (NRCC)
PIRS-0815 The IRS Fricke Dosimetry System Available from the National Research Council, Ionizing Radiation Standards, Institute for National Measurement Standards, Ottawa, Ontario. K1A 0R6.Keywords
absorbed dose; dosimetry; ferrous ammonium sulfate dosimeter; ferrous sulfate dosimeter; Fricke dosimeter; reference-standard dosimetry system;
ICS Code
ICS Number Code 17.240 (Radiation measurements)
DOI: 10.1520/E1026-04E01
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