Stopping Power and Energy Loss for Ion Pair Production for 340-Mev Protons

The relative stopping powers for 300-Mev protons of H, Li, Be, C, Al, Fe, Cu, Ag, Sn, W, Pb, and U have been measured. The energy spent per ion-pair production in the gases ${\mathrm{H}}_2$, He, ${\mathrm{N}}_2$, ${\mathrm{O}}_2$, Ne, A, and air at 340-Mev proton energy has also been measured. The results are given in Tables I and II.