Calculation of the energy loss and stopping power when protons react with hydroxylapatite compound

The use of powerful proton beams to irradiate biological cells has a variety of applications in medical physics, for example, cancer treatment with Hadron therapy and astronaut radiation shielding. As a result, to better control and knowledge of the effects of radiation real damage on living tissues, an exact description of the energy loss from the proton beam to the sample is necessary. In this study, a dielectric formalism was used to calculate the probability of an energetic proton producing electronic excitations in a sample of high biological interest, namely, Hydroxyapatite, which constitutes the bulk of the bones and teeth compounds. Screening length effects were taken into account. All mathematical equations are programmed using Fortran 90.