ASTM-E1026:2004 Edition

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E1026-04 Standard Practice for Using the Fricke Reference Standard Dosimetry System

Published By	Publication Date	Number of Pages
ASTM	2004	8

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Category: ASTM

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Description

ASTM E1026-04

Historical Standard: Standard Practice for Using the Fricke Reference Standard Dosimetry System

ASTM E1026

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 Gys¹ (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 1—The 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 60°C.

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.

Keywords

absorbed dose; dosimetry; ferrous ammonium sulfate dosimeter; ferrous sulfate dosimeter; Fricke dosimeter; reference-standard dosimeter; transfer-standard dosimeter

ICS Code

ICS Number Code 17.240 (Radiation measurements)

DOI: 10.1520/E1026-04

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Significance and Use Interferences
3	Apparatus Reagents Preparation of Dosimeters
4	Calibration of the Dosimetry System Irradiation and Measurement Procedures
6	Minimum Documentation Requirements Measurement Uncertainty Keywords
7	X1. ALTERNATIVE METHOD FOR PREPARATION OF DOSIMETRIC SOLUTION X1.1 X1.2 X1.3 X1.4 X1.5 X2. PROCEDURE FOR DETERMINATION OF FOR FERRIC IONS X2.1 X2.2 X2.3 X2.4 X2.5 X2.6 X2.7
8	REFERENCES