Study of Stopping Power and Range for Protons

      The calculation of the value of stopping power and the range for the proton is done by two ways : first, using Bethe-Bloch formula and second, using Bragg-Kleeman rule. The differences between the experimental and theoretical values of stopping power and range required studying  the corrections for Bethe-Bloch formula which are represented by the maximum energy and density correction and then comparing the results with experimental values. Using these two formulas it has been found that the results computed by the Bethe-Bloch formula without corrections (maximum energy and density correction) are in agreement with experimental results for 2≤ βγ  (MeVE102 ×≤ ) and for 10≤βγ (MeVE 5310≤ ) with corrections. The maximum energy and density corrections contributed to decrease the difference with the experimental results for 10≥βγ (MeVE 10≥ ).252 The values of stopping power computed using the Bragg-Kleeman rule are in agreement with experimental results for MeVE 200≤  and the range values computed using the Bragg-Kleeman rule are in agreement with the results computed using the Bethe-Bloch formula for MeVE 400≤ The results show that the energy losses for protons at the high  energy values are low and vise versa; the energy losses for protons at the low energy values are high. The present calculations confirm that the proton looses its largest energy at the end of its path in matter.