Interaction parameters of protons in Aluminum and Iron

The interactions parameters(including ,stopping power with orbital electrons, continues slowing down ranges approximation and square of screening angle)for slow protons(10-500)MeV in aluminum and iron elements were calculated by adopting empirical equations through using Visual Basic Studio program 2016. the present study indicates that the calculated parameters show a linearity with the atomic number (Z) and the proton incident energy of the absorber the comparison with the available pervious experimental work gives a good agreement.