Dosimetric constants calculation of isotropic point source

Γδ,X and Γδ,Ka values of over 800 kinds of nuclides, which could transmit photons, were recalculated in this study based on their decay schemes, the quality-energy absorption coefficients of air to photons and the newest data of W value. The results were obviously different from those calculated before at about 2% deviation. The authors also calculated Γδ,H (peripheral dose equivalent ratio constant) and Γδ,H (directional dose equivalent ratio constant), respectively, by using the conversion coefficients given in ICRU-47 report