Stopping Power and Range Calculations of Electrons For Some Human Body Tissues

Abstract

This study presents calculation results of the stopping power and range of electrons of kinetic energy from 20 eV to 10 MeV for some human body tissues. The method is based on utilization of the modified Bethe-Bloch stopping power expression and analytical expression for effective atomic electron number and effective mean excitation energies of target atoms, and for effective charge of incoming electrons. For this aim, Sugiyama’s semi-empirical formula from Petersen and Green is embedded in the formula. An analytical expression for the practical stopping power calculations using Bethe approximation and Thomas-Fermi Model of atom is taken from the previous study.

The calculated results of the stopping power and range for electrons in some materials, such as adipose tissue, bone and water are compared with a number of other calculation such as the Penelope 14 code and ESTAR results. The present electron stopping power and range calculation method should be useful in nuclear medicine, radiation treatment, and biomedical dosimetry.

 

Keywords

• Effective Charge,Effective Mean Excitaion Energy,CSDA Range,Lenz-Jensen screening function,Tietz Screening function

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