Stopping Cross Sections of Metals for Protons of Energies from 400 to 1000 kev

The stopping cross sections of manganese, copper, germanium, selenium, silver, tin, antimony, gold, lead, and bismuth are reported for protons in the energy range 400 to 1000 kev. The cross sections are roughly proportional to the square root of the atomic number of the stopping element and inversely proportional to the velocity of the incident protons. There is some evidence that the stopping cross section increases more rapidly than Z1/2 as the various p shells are filled.