Abstract
The recently available spectroscopic data and the RKR potentials of the alkali hydrides allow us to determine the "experimental" values of the parameters relevant to the transition probability of the charge transfer processes. In the Landau-Zener model these parameters are the energy gap between the A1Σ+ and X1Σ+ adiabatic potentials at the avoided crossing distance and the coupling matrix elements. In this paper the coupling matrix elements are evaluated in a twostate ionic-covalent interaction model. The systematic trends found in the alkali hydride series for their X1Σ+ potentials are presented. This leads to a simple model for the ionic potentials.
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