https://doi.org/10.1007/s100530050312
Positronium formation cross-sections in the ground and excited states ({n=2} levels) in an e+-He atom collision
Department of Theoretical Physics, Indian Association for the Cultivation of Science,
Jadavpur, Calcutta-700 032, India
Received:
20
July
1998
Revised:
5
January
1999
Published online: 15 June 1999
The positronium formation cross-sections in the ground and excited n=2 levels
have been studied in an 
-He atom collision in the framework of eikonal
approximation. Both the differential and total formation cross-sections have
been investigated in the intermediate- and high-energy regime. Present eikonal
results are found to differ appreciably from the corresponding first Born
values even at very high incident energies. The total cross-section results
have been compared with available experiments due to different groups as well
as with other existing theoretical results.
PACS: 34.70.+e – Charge transfer
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
