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BS EN ISO 4037-3:2021

BS EN ISO 4037-3:2021

$215.11

Radiological protection. X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy – Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence

Published By Publication Date Number of Pages
BSI 2021 78
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This document specifies additional procedures and data for the calibration of dosemeters and doserate meters used for individual and area monitoring in radiation protection. The general procedure for the calibration and the determination of the response of radiation protection dose(rate)meters is described in ISO 29661 and is followed as far as possible. For this purpose, the photon reference radiation fields with mean energies between 8 keV and 9 MeV, as specified in ISO 4037‑1, are used. In Annex D some additional information on reference conditions, required standard test conditions and effects associated with electron ranges are given. For individual monitoring, both whole body and extremity dosemeters are covered and for area monitoring, both portable and installed dose(rate)meters are covered.

Charged particle equilibrium is needed for the reference fields although this is not always established in the workplace fields for which the dosemeter should be calibrated. This is especially true at photon energies without inherent charged particle equilibrium at the reference depth d, which depends on the actual combination of energy and reference depth d. Electrons of energies above 65 keV, 0,75 MeV and 2,1 MeV can just penetrate 0,07 mm, 3 mm and 10 mm of ICRU tissue, respectively, and the radiation qualities with photon energies above these values are considered as radiation qualities without inherent charged particle equilibrium for the quantities defined at these depths. This document also deals with the determination of the response as a function of photon energy and angle of radiation incidence. Such measurements can represent part of a type test in the course of which the effect of further influence quantities on the response is examined.

This document is only applicable for air kerma rates above 1 µGy/h.

This document does not cover the in-situ calibration of fixed installed area dosemeters.

The procedures to be followed for the different types of dosemeters are described. Recommendations are given on the phantom to be used and on the conversion coefficients to be applied. Recommended conversion coefficients are only given for matched reference radiation fields, which are specified in ISO 4037‑1:2019, Clauses 4 to 6. ISO 4037‑1:2019, Annexes A and B, both informative, include fluorescent radiations, the gamma radiation of the radionuclide241Am, S-Am, for which detailed published information is not available. ISO 4037‑1:2019, Annex C, gives additional X radiation fields, which are specified by the quality index. For all these radiation qualities, conversion coefficients are given in Annexes A to C, but only as a rough estimate as the overall uncertainty of these conversion coefficients in practical reference radiation fields is not known.

NOTE The term dosemeter is used as a generic term denoting any dose or doserate meter for individual or area monitoring.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
8 Introduction
9 1 Scope
10 2 Normative references
3 Terms and definitions
4 Procedures applicable to all area and personal dosemeters
4.1 General principles
4.1.1 Radiation qualities
11 4.1.2 Recommended conversion coefficients
12 4.1.3 Point of test and reference point
4.1.4 Axes of rotation
13 4.1.5 Condition of the dosemeter to be calibrated
4.1.6 Effects associated with electron ranges
14 4.2 Methods for the determination of the calibration factor and of the response
4.2.1 Operation of the standard instrument
15 4.2.2 Measurements without a monitor for the source output
5 Particular procedures for area dosemeters
5.1 General principles
5.2 Quantities to be measured
6 Conversion coefficients for area dosimetry
6.1 Conversion coefficients from air kerma, Ka, to H'(0,07)
6.1.1 Mono-energetic radiation
16 6.1.2 Low air kerma rate series
6.1.3 Narrow series
6.1.4 Wide series
6.1.5 High air kerma rate series
6.1.6 Radionuclides
23 6.2 Conversion coefficients from air kerma, Ka, to H'(3)
6.2.1 Mono-energetic radiation
6.2.2 Low air kerma rate series
6.2.3 Narrow series
6.2.4 Wide series
6.2.5 High air kerma rate series
6.2.6 Radionuclides
6.2.7 High energy photon radiations
31 6.3 Conversion coefficient from air kerma, Ka, to H*(10)
6.3.1 Mono-energetic radiation
6.3.2 Low air kerma rate series
6.3.3 Narrow series
6.3.4 Wide series
6.3.5 High air kerma rate series
6.3.6 Radionuclides
6.3.7 High energy photon radiations
35 7 Particular procedures for personal dosemeters
7.1 General principles
7.2 Quantities to be measured
7.3 Experimental conditions
7.3.1 Use of phantoms
36 7.3.2 Geometrical considerations in divergent beams
7.3.3 Simultaneous irradiation of several dosemeters
37 7.3.4 Influence of the orientation on the values of Hp(0,07)
38 7.3.5 Length of the rod phantom
8 Conversion coefficients for personal dosimetry
8.1 General
8.2 Conversion coefficients from air kerma, Ka, to Hp(0,07) in the rod phantom
8.2.1 Mono-energetic radiations
8.2.2 Low air kerma rate series
8.2.3 Narrow series
8.2.4 Wide series
8.2.5 High air kerma rate series
39 8.2.6 Radionuclides
42 8.3 Conversion coefficients from air kerma, Ka, to Hp(0,07) in the pillar phantom
8.3.1 Mono-energetic radiations
8.3.2 Low air kerma rate series
8.3.3 Narrow series
8.3.4 Wide series
8.3.5 High air kerma rate series
8.3.6 Radionuclides
45 8.4 Conversion coefficients from air kerma, Ka, to Hp(0,07) in the ICRU slab phantom
8.4.1 Mono-energetic radiations
8.4.2 Low air kerma rate series
8.4.3 Narrow series
8.4.4 Wide series
46 8.4.5 High air kerma rate series
8.4.6 Radionuclides
49 8.5 Conversion coefficients from air kerma, Ka, to Hp(3) in the cylinder phantom
8.5.1 Mono-energetic radiations
8.5.2 Low air kerma rate series
8.5.3 Narrow series
8.5.4 Wide series
8.5.5 High air kerma rate series
8.5.6 Radionuclides
8.5.7 High energy photon radiations
52 8.6 Conversion coefficients from air kerma, Ka, to Hp(10) in the ICRU slab phantom
8.6.1 Mono-energetic radiations
53 8.6.2 Low air kerma rate series
8.6.3 Narrow series
8.6.4 Wide series
8.6.5 High air kerma rate series
8.6.6 Radionuclides
8.6.7 High energy photon radiations
61 9 Uncertainties
9.1 Statement of uncertainties
62 Annex A (informative) Estimated conversion coefficients for fluorescence X radiation
67 Annex B (informative) Estimated conversion coefficients for gamma radiation emitted by 241Am radionuclide
69 Annex C (informative) Estimated conversion coefficients for continuous filtered X radiation based on the quality index
71 Annex D (informative) Additional information
75 Bibliography

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BS EN ISO 4037-3:2021
$215.11