Stopping powers of the noble gases for (0.3-10)-MeV nitrogen ions.

Stopping powers of the noble gases for 300-keV to 10-MeV nitrogen ions were measured using a time-of-flight technique. The stopping power was directly determined from changes in ion'time of flight over a fixed distance as a function of the target-gas pressure of a differentially pumped, windowless gas cell. The measured stopping-power values are compared to predictions of the modified Firsov theory of Land and Brennan (FLB) [At. Data Nucl. Data Tables 22, 235 (1978)] and to values compiled by Ziegler et al. [Stopping and Range of Ions in Solids (Pergamon, New York, 1985)]. The measured values are close to the FLB values at υ=υ 0 for low target atomic number Z but are somewhat lower at higher Z