Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8210522 | Applied Radiation and Isotopes | 2013 | 7 Pages |
Abstract
Systematic calculations are performed for determining the stopping powers (SP) and inelastic mean free paths (IMFP) for 20Â eV-20Â keV electrons in 11 types of human tissue. The calculations are based on a dielectric model, including the BornâOchkur exchange correction. The optical energy loss functions (OELF) are empirically evaluated, because of the lack of available experimental optical data for the 11 tissues under consideration. The evaluated OELFs are examined by the f-sum rule expected from the dielectric response theory, and by calculation of the mean excitation energy. The calculated SPs are compared with those for PMMA (polymethylmethacrylate, a tissue equivalent material) and liquid water. The SP and IMFP data presented here are the results for the 11 human tissues over the energy range of 20Â eV-20Â keV, and are of importance in radiotherapy planning and for studies of various radiation effects on human tissues.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
Zhenyu Tan, Wei Liu,