Regge Oscillations in Ion-Atom collisions

Regge oscillations associated with quantum corrections to the integral cross sections computed using the impact parameter method were previously discovered in H$^+$ + H cross sections \cite{MKO04}. In the present work we argue that these oscillations are a general feature of slow, sub-eV ion-atom collisions. This is illustrated by proton-noble gas elastic cross sections computed using {\it ab-initio} adiabatic molecular energy curves. A detailed analysis of the H$+$ + He collisions is given. This research has been supported by the Chemical Science, Geosciences and Biosciences Division, Office of Basic Energy Science, Office of Science, under Grant No. DE-FG02-02ER15283 and by Offices of Basic Energy and Fusion Energy Sciences, U.S. Department of Energy, through Oak Ridge National Laboratory, managed by UT-Battelle, LLC under contract DE-AC05-00OR22725. \begin{thebibliography}{99} \bibitem{MKO04} J. H. Macek, P. S. Krstic, and S. Yu. Ovchinnikov, Phys. Rev. Lett. \textbf{93}, 183203 (2004). \end{thebibliography}