ISO 4037-4:2019 PDF

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 radiation fields

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Title (English):

ISO 4037-4:2019

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: January 18, 2019
Edition:: ISO IS 4037 edition 2 version 1
ICS:: 17.240

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Description (English):

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.

Technical details

Technical committee: ISO/TC 85/SC 2 - Radiological protection
SKU: ISO 4037-4:2019

Abstract

Overview

ISO 4037-4:2019 is part of the ISO 4037 series on reference photon radiation fields and provides guidance for calibrating area and personal dosemeters in low energy X‑ray reference radiation fields (nominal tube potentials ≤ 30 kV). The standard focuses on characterization of low‑energy photon radiations and on procedures to determine dosemeter and dose‑rate meter responses as a function of photon energy and angle of incidence. It emphasizes accurate determination of conversion coefficients from air kerma to operational quantities such as Hp(10), H(10), Hp(3)* and H'(3), and describes direct calibration alternatives using appropriate reference instruments.

Key topics

Scope and definitions for low energy X‑ray reference radiations (≤ 30 kV).
Characterization and production of low energy reference fields, including tube potential and spectral fluence requirements.
Dosimetry methods for low energy fields and stability checks (monitor chambers, stability check facilities).
Calibration methods:
- Method I: dosimetry in terms of air kerma followed by application of conversion coefficients (from air kerma to dose equivalents).
- Method II: direct calibration using reference instruments calibrated in terms of the ICRU operational dose equivalent quantities.
Dependence on photon energy and incidence angle, and procedures to measure response across spectra and angles.
Uncertainty management aiming at realistic overall uncertainties (document references target ~6–10% for phantom‑related operational quantities).
Practical corrections such as air density correction (Annex A) and treatment of spectral measurement conditions.

Applications and users

ISO 4037-4:2019 is intended for organizations and professionals involved in radiation protection metrology and calibration:

National metrology institutes and accredited calibration laboratories performing dosemeter and dose‑rate meter calibration.
Radiation protection services and health physics teams ensuring occupational dose monitoring accuracy.
Manufacturers of personal and area dosemeters and doserate meters validating instrument response at low energies.
Medical physics departments and diagnostic radiology facilities requiring traceable calibrations for workplace monitoring.
Regulators and accreditation bodies defining calibration and performance requirements for low energy X‑ray monitoring.

Related standards

ISO 4037‑1: radiation characteristics and production methods
ISO 4037‑2: dosimetry for radiation protection (8 keV – 1.3 MeV & 4–9 MeV)
ISO 4037‑3: calibration and response measurement methods
ISO 29661: reference radiation field definitions
ISO/IEC Guide 98‑3 (GUM): expression of measurement uncertainty

ISO 4037‑4:2019 is essential for ensuring reliable, traceable calibration of dosemeters in low energy X reference radiation fields and for minimizing energy‑ and angle‑dependent errors in operational dose quantities.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics

Scope and definitions for low energy X‑ray reference radiations (≤ 30 kV).
Characterization and production of low energy reference fields, including tube potential and spectral fluence requirements.
Dosimetry methods for low energy fields and stability checks (monitor chambers, stability check facilities).
Calibration methods:
- Method I: dosimetry in terms of air kerma followed by application of conversion coefficients (from air kerma to dose equivalents).
- Method II: direct calibration using reference instruments calibrated in terms of the ICRU operational dose equivalent quantities.
Dependence on photon energy and incidence angle, and procedures to measure response across spectra and angles.
Uncertainty management aiming at realistic overall uncertainties (document references target ~6–10% for phantom‑related operational quantities).
Practical corrections such as air density correction (Annex A) and treatment of spectral measurement conditions.

Applications and users

ISO 4037-4:2019 is intended for organizations and professionals involved in radiation protection metrology and calibration:

National metrology institutes and accredited calibration laboratories performing dosemeter and dose‑rate meter calibration.
Radiation protection services and health physics teams ensuring occupational dose monitoring accuracy.
Manufacturers of personal and area dosemeters and doserate meters validating instrument response at low energies.
Medical physics departments and diagnostic radiology facilities requiring traceable calibrations for workplace monitoring.
Regulators and accreditation bodies defining calibration and performance requirements for low energy X‑ray monitoring.

Related standards

ISO 4037‑1: radiation characteristics and production methods
ISO 4037‑2: dosimetry for radiation protection (8 keV – 1.3 MeV & 4–9 MeV)
ISO 4037‑3: calibration and response measurement methods
ISO 29661: reference radiation field definitions
ISO/IEC Guide 98‑3 (GUM): expression of measurement uncertainty

ISO 4037-4:2019 PDF

Technical details

Abstract

Overview

Key topics

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics

Applications and users

Related standards

Related standards

Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters and…

Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters and…

Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters and…

Reference radiation fields for radiation protection - Definitions and fundamental concepts (ISO 29661:2012)