Welcome to DDCC (Databases of Dose Conversion Coefficient) homepage! This web site provides EXCEL files that contain the numerical values of the fluence-to-dose conversion coefficients calculated by the PHITS code coupled to the ICRP/ICRU adult reference computational phantoms. In addition, they have a function to make a plot of the data for 4 user-specified conditions. These databases are useful in the shielding design of nuclear facilities and accelerators as well as the evaluation of cosmic-ray doses for aircrews and astronauts. If you have any questions or comments on these databases, please E-mail to nsed-expacsjaea.go.jp

Jul. 20, 2017 DDCC ver 1.1 for neutrons, protons, alpha particles and heavy ions are released. The data missed in the previous version, i.e. conversion coefficients for organ doses and effective doses for neutrons, protons and alpha particles, are included in this version. Apr. 1, 2010 DDCC ver 1.0 for neutrons, protons, alpha particles and heavy ions are released. The conversion coefficients for organ doses and effective doses for neutrons, protons and alpha particles are NOT included in this version.