https://doi.org/10.1007/s100530050247
Effect of electron correlation on positronium formation in positron-helium scattering
1
Instituto de Física Teórica, Universidade Estadual Paulista
01.405-900 São Paulo, São Paulo, Brazil
2
Department of Physics, Visva Bharati University,
Santiniketan 731235, India
Received:
9
April
1998
Revised:
29
September
1998
Accepted:
19
October
1998
Published online: 15 February 1999
A three-parameter correlated wave function for the helium ground state is
used to study the scattering reaction 
, where Ps stands for positronium atom. An
exact analytical expression is
constructed for the first Born scattering amplitude for Ps formation from
helium. Based on this numerical
results are presented for both differential and total cross-sections. It is
demonstrated that the inner electronic correlation of the target atom plays a
crucial role in explaining the discrepency between theory and experiment.
PACS: 34.90.+q – Other topics in atomic and molecular collision processes and interactions / 34.50.-s – Scattering of atoms, molecules, and ions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
