Comparison of experimental stopping power data for MeV protons, deuterons and alpha particles

Stopping power data for MeV light ions published by groups from Nara University and from Risoe are compared. The results of the two groups agree within the stated accuracies for deuterons and alphas, while the Nara results are systematically lower for protons. Based on the failure of the Nara group to obtain the same stopping power for protons and deuterons of the same velocity, and on comparisons with other published data, it is concluded that the Nara proton results are systematically too low. (Auth.)