COMPARISON OF ENERGY DEPOSITION CALCULATIONS BY THE LAHET CODE SYSTEMWITH EXPERIMENTAL RESULTS

A comparison was performed between the energy deposition predicted by the LAHET code system (LCS) and experimental values for 800-, 1000-, a nd 1200-MeV protons on targets composed of beryllium, carbon, aluminum , iron, copper, lead, bismuth, and uranium. The lead, bismuth, and ura nium targets showed agreement within similar to 10% at locations throu ghout the targets, and the agree ment of the total energy deposited ov er the axial length of the targets ranged from 1 to 18%. For the light er materials, the agreement at locations throughout the target was wit hin similar to 25%. No definable trend could be determined for the lig hter materials because some LCS predictions were greater and some were less than the experimental results, and some showed very good agreeme nt. Also, the LCS underpredicted the proton ranges for 800-MeV protons on iron, 800- and 1000-MeV protons on copper, and 800- and 1000-MeV p rotons on uranium.