Oa. Fojon et al., CONTINUUM-DISTORTED-WAVE - FINAL-STATE APPROXIMATION IN POSITRON-HYDROGENIC ATOM (ION) COLLISIONS WITH POSITRONIUM FORMATION, Physical review. A, 54(6), 1996, pp. 4923-4930
We study theoretically the formation of positronium atoms through elec
tron capture in collisions of positrons impacting on hydrogenlike targ
ets such as He+, Li2+, and Be3+. We obtain the scattering amplitude of
the charge-exchange process by using a distorted-wave model derived f
rom the first order of a Dodd and Greider's expansion. We compute diff
erential and total cross sections by using a partial-wave technique.