CHARGE-TRANSFER AND IONIZATION IN PROTON-ALKALI ATOMS COLLISIONS WITHAND WITHOUT ELECTRIC-FIELD

The classical trajectory Monte Carlo simulation has been used to inves tigate the collisions of protons with alkali metal atoms in their grou nd state. Model interaction potential has been used to describe the el ectron-ionic core interaction. The cross sections for the capture and ionization in the energy range 1-100 keV/amu have been calculated and compared with the available experimental and theoretical results. The effects of the presence of a strong static electric field in different geometrical features on the capture and ionrzation cross sections hav e also been investigated. It has been found that the electric field ca uses the cross section for the capture to decrease while for the ioniz ation enhance dramatically. Many of the null field features are retain ed. The analyses of the final state n, l-distribution in the electron capture process reveals H(2p) to be the most populated level in both t he cases; with and without electric field.