A Note on Effective Mass Stopping Power Ration High-Energy Photon Dosimetry

抄録

The formulae for effective mass stopping power ratio i n high-energy photon dosimetry given by Almond et al. and Shiragai include some parameters. In spite of fundamental difference in derivation of the two equations, there is a relation among those parameters. The cavity-wall transmission rate of secondary electrons originated in medium (introduced by Shiragai), exactly, is not equal to the fraction of the cavity ionisation from electrons originated in medium (introduced by Almond et al. ).