Re-calculation of air kerma to dose-equivalent conversion coefficients for mono-energetic photons
This work presents new calculations of conversion coefficients (CCs) from total air kerma to dose-equivalent quantities<i>H'</i>(0.07),<i>H'</i>(3),<i>H*</i>(10),<i>H</i><sub>p</sub>(0.07),<i>H</i><sub>p</sub>(3), and<i>H</i><sub>p</sub>(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 Monte Carlo N-Particle® (MCNP) code were performed for a large number of photon energies with the aim of preventing 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 dosimeter calibrations, e.g. the presented values of CC to<i>H*</i>(10) for the main photon energies of<sup>137</sup>Cs and<sup>60</sup>Co radionuclides are both lower by 2.8%. Finally, it was found that the values of CCs to<i>H</i><sub>p</sub>(0.07;<i>E, α</i>)<sub>slab</sub>given in ISO 4037-3:2019 were not taken correctly from the source publication. In conclusion, the CC values given in ISO 4037-3:2019 should be updated in view of the results obtained.
Authors
- Miloš Živanović (ORCID: https://orcid.org/0000-0003-2965-1897)
- Luka Bakrač (ORCID: https://orcid.org/0000-0001-6756-6672)
- Vladimír Sochor
- T. Siiskonen (ORCID: https://orcid.org/0000-0002-4471-6938)
- P. Avilés Lucas (ORCID: https://orcid.org/0000-0003-4735-9769)
- A. Ciccotelli (ORCID: https://orcid.org/0000-0002-7643-1195)
- Olivier Van Hoey (ORCID: https://orcid.org/0000-0002-6649-2138)
- Massimo Pinto (ORCID: https://orcid.org/0000-0002-8122-7084)
- J. Šolc (ORCID: https://orcid.org/0000-0002-1629-5697)
- N. Cornejo Díaz (ORCID: https://orcid.org/0000-0001-6757-4998)
- Nikola Kržanović (ORCID: https://orcid.org/0000-0002-9210-5840)
- Joonas Tikkanen (ORCID: https://orcid.org/0000-0002-4005-4885)
- Hayo Zutz (ORCID: https://orcid.org/0000-0002-0907-6509)
- R. Behrens (ORCID: https://orcid.org/0000-0002-4905-7791)
- A C Fernandes (ORCID: https://orcid.org/0000-0002-0729-3200)
- Dušan Topalović (ORCID: https://orcid.org/0000-0001-5976-963X)
- S. Ketelhut (ORCID: https://orcid.org/0000-0003-2099-3452)
- Jiří Tesař (ORCID: https://orcid.org/0000-0002-5691-4050)
Institutions
- National Agency for New Technologies, Energy and Sustainable Economic Development (IT)
- Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento (PT)
- Universidad Complutense de Madrid (ES)
- Physikalisch-Technische Bundesanstalt (DE)
- Universidade Politécnica de Lisboa (PT)
- University of Belgrade (RS)
- Belgian Nuclear Research Centre (BE)
- Ruđer Bošković Institute (HR)
- Český metrologický institut (CZ)
- Arheološki Institut (RS)
- Institute of Economic Sciences (RS)
- Istituto Nazionale di Ricerca Metrologica (IT)
- Institute of Physics Belgrade (RS)
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES)
- Radiation and Nuclear Safety Authority (FI)
Publication Details
- Journal
- Journal of Radiological Protection
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1088/1361-6498/adda56
- Citations
- 1
- Primary Topic
- Advanced Radiotherapy Techniques
- Type
- article
- Field-Weighted Citation Impact
- 1.88
Funders
- European Partnership on Metrology
- Ministerstvo Průmyslu a Obchodu