ISO 4037-4:2019
Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 4: Calibration of area and personal dosemeters in low energy X reference radi
This document gives guidelines on additional aspects of the characterization of low energy photon radiations and on the procedures for calibration and determination of the response of area and personal dose(rate)meters as a function of photon energy and angle of incidence. This document concentrates on the accurate determination of conversion coefficients from air kerma to Hp(10), H*(10), Hp(3) and H'(3) and for the spectra of low energy photon radiations. As an alternative to the use of conversion coefficients the direct calibration in terms of these quantities by means of appropriate reference instruments is described.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols (and abbreviated terms)
5 General procedures for calibrating and determining response
6 Characterisation and production of low energy X-ray reference radiations
6.1 General
6.2 Tube potential
6.3 Spectral fluence and conversion coefficients
7 Dosimetry of low energy reference radiations
7.1 General
7.2 Stability check facility
8 Calibration and determination of the response as a function of photon energy and angle of radiation incidence
8.1 General
8.2 Selection of calibration method
8.3 Calibration by using reference instruments for Ka
8.3.1 General
8.3.2 Conventional quantity value of the air kerma
8.3.3 Conventional quantity value of the dose equivalent quantities Hp(0,07) and H'(0,07)
8.3.4 Conventional quantity value of the dose equivalent quantities Hp(10) or H*(10) and Hp(3) or H'(3)
8.3.5 Performing the calibration
8.4 Calibration by using reference instruments which measure the ICRU dose equivalent quantities
8.4.1 General
8.4.2 Conventional quantity value of the dose equivalent quantities Hp(10) or H*(10) and Hp(3) or H'(3)
8.4.3 Performing the calibration
8.5 Statement of uncertainty
Annex A (normative) Correction for air density
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols (and abbreviated terms)
5 General procedures for calibrating and determining response
6 Characterisation and production of low energy X-ray reference radiations
6.1 General
6.2 Tube potential
6.3 Spectral fluence and conversion coefficients
7 Dosimetry of low energy reference radiations
7.1 General
7.2 Stability check facility
8 Calibration and determination of the response as a function of photon energy and angle of radiation incidence
8.1 General
8.2 Selection of calibration method
8.3 Calibration by using reference instruments for Ka
8.3.1 General
8.3.2 Conventional quantity value of the air kerma
8.3.3 Conventional quantity value of the dose equivalent quantities Hp(0,07) and H'(0,07)
8.3.4 Conventional quantity value of the dose equivalent quantities Hp(10) or H*(10) and Hp(3) or H'(3)
8.3.5 Performing the calibration
8.4 Calibration by using reference instruments which measure the ICRU dose equivalent quantities
8.4.1 General
8.4.2 Conventional quantity value of the dose equivalent quantities Hp(10) or H*(10) and Hp(3) or H'(3)
8.4.3 Performing the calibration
8.5 Statement of uncertainty
Annex A (normative) Correction for air density
Bibliography