Re-calculation of air kerma to dose equivalent conversion coefficients for mono-energetic photons
Autor(in); Institution
Šolc, Jaroslav; Czech Metrology Institute, Brno, CZECH REPUBLIC
Aviles Lucas, Paz; Laboratorio de Metrologia de Radiaciones Ionizantes, Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, Madrid, SPAIN
Bakrac, Luka; Ruder Boskovic Institute, Zagreb, CROATIA
Area dosimetry ; conversion coefficients ; ISO 4037 standard ; Monte Carlo ; MCNP ; personal dosimetry ; total air kerma
Zusammenfassung
This work presents new calculations of conversion coefficients (CCs) from total air kerma to dose equivalent quantities H'(0.07), H'(3), H*(10), Hp(0.07), Hp(3), and Hp(10) for area and personal dosimetry for mono-energetic photons in the energy range from 2 keV to 50 MeV, assuming secondary charged particle equilibrium. Calculations using the MCNP Monte Carlo code were performed for a large number of photon energies with the aim to prevent errors resulting from possible improper interpolation between currently available sparsely spaced CC values, when an average CC value over a photon fluence spectrum needs to be determined. The CC values were compared with the values published in the ISO 4037-3:2019 standard. A very close agreement was achieved for the majority of CCs. Larger discrepancies were found for some CCs, often for low photon energies or large angles of radiation incidence, which were taken from older publications or when CC values were interpolated or extrapolated. Furthermore, some differences were found in the MeV energy range which are significant for dosemeter calibrations, e.g., the presented values of CC to H*(10) for the main photon energies of 137Cs and 60Co radionuclides are both lower by 2.8 %. Finally, it was found that the values of CCs to Hp(0.07; E, α)slab given in ISO 4037 3:2019 were not taken from the source publication correctly. In conclusion, the CC values given in ISO 4037-3:2019 should be updated in view of the results obtained.
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Open Access Hybrid
Rechteinformation
CC BY 4.0 ; Creative Commons Attribution 4.0 License
Themenbereich der Metrologie
Ionisierende Strahlung
Geschäftsfelder
Metrologie für die Gesellschaft
Forschungsprojekt
22NRM07: GuideRadPROS: Harmonisation, update and implementation of standards related to radiation protection dosimeters for photon radiation
Förderinformationen (1)
Förderername: European Commission (EC)
Förderer ID: 0000 0001 2242 8989
Förderer ID Typ: ISNI
Förderprogramm: Metrology Partnership 2022 Normative
Titel der Förderung: 22NRM07: GuideRadPROS: Harmonisation, update and implementation of standards related to radiation protection dosimeters for photon radiation
Förderungsnummer: 22NRM07
Zitierung
Šolc, J., Aviles Lucas, P., Bakrac, L., Behrens, R., Ciccotelli, A., Cornejo Díaz, N. A., Fernandes, A., Ketelhut, S., Krzanovic, N., Pinto, M., Siiskonen, T., Sochor, V., Tesar, J., Tikkanen, J. S., Topalovic, D. B., Van Hoey, O., Zutz, H., & Zivanovic, M. (2025). Re-calculation of air kerma to dose equivalent conversion coefficients for mono-energetic photons. Journal of Radiological Protection, 45(2), 1–25. https://doi.org/10.1088/1361-6498/adda56
