Abstract
In this work, the mass stopping power and range of protons in biological human body tissues (ovary, lung and breast) were calculated at the energy ranging from 0.04 MeV to 200 MeV using the MATLAB Program. The data relating to the densities, average atomic number to mass number and excitation energy for the present tissues were collected from ICRU Report 46. The mass stopping power was calculated by the Bethe formula. Moreover, the simple integration (continuous slowing down approximation) method was employed for calculating protons range at the tissues. The results of the mass stopping power versus energy and the range versus energy were presented graphically and the empirical formulae for calculating the mass stopping power and the ranges were obtained. The present results for mass stopping powers and ranges were compared with the results obtained by others. Good agreements were found between them, especially at the energy ranging from 3 to 200 MeV.
Highlights
IntroductionThe stopping power and energy dissipation of charged particles through matter has been a subject of great interest for 100 years, because of its wide areas of application, such as ion implantation, fundamental particle physics, nuclear physics, radiation damage, radiology [1]
The mass stopping power and range of protons in biological human body tissues were calculated at the energy ranging from 0.04 MeV to 200 MeV using the MATLAB Program
The Continuous Slowing Down Approximation (CSDA) is a simple and common method to calculate the range of the heavy particles like protons in the targets and this method is employed in this study
Summary
The stopping power and energy dissipation of charged particles through matter has been a subject of great interest for 100 years, because of its wide areas of application, such as ion implantation, fundamental particle physics, nuclear physics, radiation damage, radiology [1]. The theoretical and experimental studies of the Stopping Power (SP) and range of charged particles have been increasing, especially in radiation physics. The stopping power is defined as the mean energy loss per unit path length –dE/dx. It depends on the charge and velocity of the projectile and, the target material [6] [7]. Investigation of the energy loss of charged particles traversing matter arrives at a general stopping power formula:. If an ion beam penetrates through matter it loses energy due to collisions with electrons (electronic stopping) and target nuclei (nuclear stopping) [9]. Can be ignored [10]
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