Abstract
The single- and double-electron capture cross sections, σq,q−1 and σq,q−2 respectively, for Neq+ (q=2∼5 and q=2∼4) ions on He and H2 have been measured in the energy range from 1.5 to 12 keV/q. The results are consistent with the existing data except for q=2 and are monotone against impact energy. The σq,q−1 values, which do not satisfy the known scaling laws, are fairly well explained by the classical one electron model, while the σq,q−2’s cannot be fitted to the reported scaling rule and model. Therefore our new model is applied that projectile ion captures one or two electrons from target in a statistical way.
