Range and stopping-power equations for heavy ions

Starting with Bohr's semiclassical stopping-power equation, a set of stopping-power equations has been deduced for both partially and completely stripped heavy ions. Each of these equations is valid in a particular ion-energy region depending upon the ion-medium combination. A simple evaluation of ∫/subE/dE (dE/dx)/subE/-1 with the values of (dE/dx)/subE/ from the appropriate stopping-power equation valid in a particular ion-energy region gives the total range of a heavy ion. We have compared the available energy-loss data from other workers with the corresponding calculated values for a variety of heavy ions in different media (12C, 14N, 16O, 19F, and 20Ne ions in Al; 9Be ions in Al and Au; 10B and 11B ions in Al; 12C ions in Ar and N2; 40Ar ions in Ar and N2; 12C, 14N, and 16O ions in Si; and 10B, 11B, 12C, 14N, 16O, and 19F in oxygen). In general the agreement is very good