Sato, Tatsuhiko 
; Yasuda, Hiroshi*; Niita, Koji*; Endo, Akira ; Sihver, L.*
We performed Monte Carlo simulations for estimating the terrestrial cosmic-ray spectra using our developing code PHITS. Excellent agreements were observed between the calculated and measured spectra for almost all particles that contribute to the cosmic-ray doses for a wide altitude range even at the sea level. Based on a comprehensive analysis of the simulation results, we proposed analytical functions that can predict the cosmic-ray spectra for anywhere in the world except for the locations with altitudes over 20 km. The functions coupled with the fluence to dose conversion coefficients enable us to calculate the cosmic-ray dose rates in a short computational time. This analytical model will be incorporated into the Japanese Internet System for Calculation of Aviation Route Doses JISCARD.
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: | 2007/07 |
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: | San Francisco |
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: | U.S.A. |
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Development of software for calculating atmospheric cosmic-ray spectra instantaneously with precision; Providing world-wide contour map of the cosmic-ray dose rates