Density effect for the ionization loss of charged particles in various substances

The density-effect correction delta(..beta..) for the ionization energy loss of charged particles has been evaluated for 72 substances (34 metallic elements, 26 compounds, 11 gases, and liquid hydrogen), using up-to-date values of the mean excitation potential I and of the atomic absorption edges h..nu../sub i/, which were employed as input data for the general equations for delta(..beta..) previously derived by Sternheimer.