Exchange on ionization in -atom scatteringH. Ray
Department of Physics, Indian Institute of Technology Roorkee Roorkee 247667, Uttaranchal, India
received 29 September 2005; accepted in final form 31 October 2005
published online 23 November 2005
An improvement of the Coulomb-Born approximation is made including the effect of exchange in positronium (Ps) and atom scattering. The exchange amplitude for the simplest Ps-H system is a nine-dimensional integral. We developed a methodology of evaluating the Coulomb-Born-Oppenheimer amplitude for Ps-atom scattering and apply it to calculate the Ps-ionization cross-sections in Ps-H and Ps-He collisions. We present the first and preliminary results using the present methodology.
36.10.Dr - Positronium, muonium, muonic atoms and molecules.
34.70.+e - Charge transfer.
82.30.Gg - Positronium chemistry.
© EDP Sciences 2005