Isotopic effects in slow elastic and inelastic $He^{2+}+H$collisions

We study isotopic effects in slow (10-400 eV) collisions of alpha-particle with hydrogen using a fully quantal Hidden Crossings Coupled Channel approach [Krstic, J. Phys. B. 37, L217 (2004)]. A strong presence of the Coriolis transitions in the studied energy range as well as a competition with the radial transitions create a number of strong and unexpected isotopic effects [Stolterfoht et al, Phys. Rev. Lett. 99, 103201 (2007)] in both inelastic (charge transfer and excitation) and elastic collisions. P.K. acknowledges support from the US DOE Office of Fusion Sciences through ORNL, under contract No. DE-AC05-00OR22725 with UT-Battelle, LLC.