Fluence-to-dose conversion coefficients for muons and pions calculated based on ICRP Publication 103 using the PHITS code

Sato, Tatsuhiko   ; Endo, Akira   ; Niita, Koji*

The evaluation of the fluence-to-dose conversion coefficients for muons and pions is of great importance for the estimation of the aircrew doses from cosmic-ray exposure. Recently, ICRP released a new set of fundamental recommendations for a system of radiological protection in ICRP Publication 103. In this issue, the definition of effective dose was revised. We therefore calculated the dose conversion coefficients for muons and pions up to 100 GeV using the PHITS code, following the instructions given in ICRP103. The calculated dose conversion coefficients will be implemented in a route-dose calculation code JISCARD-EX developed by NIRS, which is currently used for the evaluation of aircrew doses for Japanese airline companies.