Stopping power values of Be, C, Al and Si for 4He ions

Absolute stopping values were measured over the energy region 200-2000 keV. Surface barrier particle detectors were used to measure changes in energy of 4He ions after traversing thin, self-supported films. All parameters involved in these measurements were examined, controlled and cross checked, to give a consistent set of stopping values with estimated errors of 4%. Our results are compared with several published semiempirical tabulations of stopping data. (orig./HP)