GB/T 12162.3-2025 X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy—Part 3:Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence

Scope

This document specifies the procedures and required data for the calibration of personal and site monitoring dosimeters and dose rate meters used for radiation protection. This document applies to the calibration of whole-body and extremity dosimeters used for personal monitoring, as well as portable and fixed-installation dose (rate) meters used for site monitoring, in radiation fields with an air kerma rate higher than 1 μGy/h. This document does not apply to the on-site calibration of fixed-installation site dosimeters. This document uses a photon reference radiation field with an average energy between 8 keV and 9 MeV, as specified in ISO 4037-1. Appendix D provides additional information on reference conditions, required standard test conditions, and effects related to electron range. Although the actual radiation field used for calibrating dosimeters may not always establish charged-particle equilibrium, the reference field is required to satisfy charged-particle equilibrium in principle. The charged-particle equilibrium at reference depth d depends on the actual combination of energy and reference depth, especially for photon energies without inherent charged-particle equilibrium. Electrons with energies above 65 keV, 0.75 MeV, and 2.1 MeV can penetrate 0.07 mm, 3 mm, and 10 mm of ICRU tissue, respectively, and photon energies above these values are considered to have no inherent charged-particle equilibrium for quantities defined at these depths. This document also addresses the determination of the response as a function of photon energy and radiation incidence angle. For determining the influence of additional influencing quantities on the response, type tests can be conducted as part of this process. This document describes the procedures to be followed for different types of dosimeters. Recommendations are provided for the phantoms to be used and the conversion coefficients to be applied. The recommended conversion coefficients are only pr

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