| Issue |
Europhys. Lett.
Volume 73, Number 1, January 2006
|
|
|---|---|---|
| Page(s) | 21 - 27 | |
| Section | Atomic and molecular physics | |
| DOI | https://doi.org/10.1209/epl/i2005-10354-1 | |
| Published online | 23 November 2005 | |
Exchange on ionization in 
-atom scattering
Department of Physics, Indian Institute of Technology Roorkee Roorkee 247667, Uttaranchal, India
Corresponding authors: hasi_ray@yahoo.com rayh1sph@iitr.ernet.in
Received:
29
September
2005
Accepted:
31
October
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.
PACS: 36.10.Dr – Positronium, muonium, muonic atoms and molecules / 34.70.+e – Charge transfer / 82.30.Gg – Positronium chemistry
© EDP Sciences, 2005
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