Studying of loss energy For Protons And alpha particle in the polymers C2H4, C12H22O2N2and C43H38O7

In this research the electronic stopping power was calculated theoretically by use modified Bethe-Bloch theory(Bloch’s, Barkas and shell corrections). Protons and alpha particle loss energy were calculated in the polymers (C2H4, C12H22O2N2 and C43H38O7) at energy range of [0. 3-1000] MeV, The equations were programmed by using (MATLAB) language. The calculations were compared with the practical results of the SRIM 2013 There is some Simple difference between practical and theoretical results. the effect of Bloch is the highest in consistency with the practical results and the Shell correction and Barkas correction values are convergent, but they move away at the practical values from the beginning of the period to the range of approximately 10MeV.