Stopping power and range calculations of electrons for some human body tissues

Abstract

Thisstudy presents calculation results of the stopping power and range of electronsof kinetic energy from 20 eV to 10 MeV for some human body tissues. The methodis based on utilization of the modified Bethe-Bloch stopping power expressionand analytical expression for effective atomic electron number and effectivemean excitation energies of target atoms, and for effective charge of incomingelectrons. For this aim, Sugiyama’s semi-empirical formula from Petersen andGreen is embedded in the formula. An analytical expression for the practicalstopping power calculations using Bethe approximation and Thomas-Fermi Model ofatom is taken from the previous study. Thecalculated results of the stopping power and range for electrons in somematerials, such as adipose tissue, bone and water are compared with a number ofother calculation such as the Penelope 14 code and ESTAR results. The presentelectron stopping power and range calculation method should be useful innuclear medicine, radiation treatment, and biomedical dosimetry.