Stopping power calculations for Very high energy electrons (50 – 250 MeV) and radiation therapy
The stopping power of high-energy electron beams in the (50-250 MeV) range is analyzed to assess the feasibility of radiotherapy. Electromagnetic control of the electron beams provides scanned intensity modulation which is not possible with photon beams during radiotherapy. This study calculated the stopping power of high-energy (50-250MeV) electrons used in radiotherapy applications in Water, Blood, and Skin(ICRP). Stopping power for electrons is calculated using the eq(10) and Semi-empirical eq(12), then compared with experimental results obtained using the program Estar. Total mass-stopping power in (MeV cm2/g) caused by the density effect (-δ) and radiative stopping power contribution using Bragg's valence law for compound targets (Z/A) and half- 50MeV to 250MeV Semi-empirical stopping energy equations included in the kinetic energy E (MeV) for electrons in ranges of higher energies are fitted by a three-parameter approximation written using (MALAB2016) language we calculated obtained from fitting with the experimental stopping power data (ESTAR) program and we calculated the error ration STEYX and correlation coefficient. With values of Estar code. It is found that our results are in good agreement with the values of the Estar code and the correlation coefficient between them is (0.999). This paper aims to provide an updated overview of mass break properties, with a focus on the requirements of electron radiotherapy in which electrons are delivered to the tumor site. The Semi-empirical results are compared.