Accelerating multiple scattering of the emitted electrons in collisions of ions with atoms and molecules

Double differential cross-sections for electron emission were measured in the collisions of N+ ions with N2, Ne and Ar targets in the 700-1500 keV impact energy range. We studied the target atomic number dependence of the Fermi-shuttle type acceleration mechanism. The experimental double differential cross-sections are in good agreement with the theoretical values obtained from CTMC calculations for argon target. According to the calculations, multiple scattering contribution to the Ar spectra above 300 eV is significant.