SINGLE-ELECTRON, DOUBLE-ELECTRON AND TRIPLE-ELECTRON CAPTURE CROSS-SECTIONS FOR MULTICHARGED SLOW CARBON-IONS IN H-2, CH4, C2H6, C3H8 AND CO2 MOLECULES

Cross sections have been measured for single, double and triple electron capture by C-q+ (q=1-4) ions from H-2, CH4, C-2 H-6, C-3 H-8 and CO2 molecules in the energy range of (1-20) q keV. The cross sections obtained here exhibit little dependence on the incident energy. Compared with the previous scaling laws, the present cross sections revealed a much stronger dependence on the first ionization potential of the molecules. For hydrocarbon molecules including H-2 all the cross sections show a remarkable linearity on the number of compositeatoms. The single electron capture cross sections sigma(q,q-1) are compared with the classical over barrier model and with the Olson model which was slighty modified so as to be applied to the molecular targets.