Artículos de revistas
Evidence of two-channel distortion effects in positronium formation reactions
Fecha
2004-12Registro en:
Macri, Pablo Alejandro; Miraglia, Jorge Esteban; Hanssen, J.; Fojon, Omar Ariel; Rivarola, Roberto Daniel; Evidence of two-channel distortion effects in positronium formation reactions; IOP Publishing; Journal of Physics B: Atomic, Molecular and Optical Physics; 37; 12-2004; L111-L119
0953-4075
CONICET Digital
CONICET
Autor
Macri, Pablo Alejandro
Miraglia, Jorge Esteban
Hanssen, J.
Fojon, Omar Ariel
Rivarola, Roberto Daniel
Resumen
The formation of ground-state positronium in collisions of positrons on
hydrogen-like atoms is considered. In previous theoretical works, two-centre
distorted wavefunctions were employed to approximate either the initial or
the final channel. Here we report results obtained by means of the eikonal
final state continuum distorted wave approximation for which asymptotically
correct distorted wavefunctions are used for both the initial and final states of
the scattering system. Comparison of the present theoretical total cross sections
with experimental data reveals that distortion effects become important in both
channels as the impact energy decreases. This work also shows that distortedwave
theories may be extended from their usual domain of high impact energies
to lower ones.