Stopping powers of C, Al, Si, Ni, Ag and Au for Li ions

Absolute stopping values for ⁷Li ions in selected target elements were measured over the energy range 0.2–1.8 MeV. Surface barrier particle detectors were used to measure the energy loss of ⁷Li ions in passing through thin, self-supported films. The results show that in the slowing down process, the effective charge ratio of lithium to hydrogen ions, at constant velocity, is not independent of the stopping medium.