Excitation mechanisms in moderate-energy K^+^-Ar and Cs^+^-Ar collisions

What is it about?

We have extensively studied collision processes in the closed-shell systems between alkali ions (M+) and rare-gas atoms (Rg). As the first, repulsive interaction potentials for the M+-Rg systems have been determined as accurate as possible by measuring integral cross sections as a function of collision energies using beam attenuation technique. As the second, we have obtained further detailed information on the interaction potentials for the M+-Rg systems by differential scattering measurements. Through these studies, we have deduced an empirical potential model representing the repulsive potentials for the Rg-Rg and M+-Rg systems. The potential model was given by overlap of charge densities of the interacting particles. This article discussed excitation processes in the K+-Ar and Cs+-Ar collisions using the interaction potentials given by the empirical charge-overlap model. Thus, the model potentials provide valuable information on the electronic excitations in the moderate-energy atomic collisions.

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Why is it important?

The potential model is quite simple, but it can be well applied to interpret the electronic excitation processes in the closed-shell systems.

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