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Title: Positronium formation in 2S-state in atomic hydrogen
Authors: Kulhar, V S
Keywords: Positronium;Atomic hydrogen
Issue Date: Apr-2008
Publisher: CSIR
Abstract: The problem of positronium formation in its first excited state (2s) in positron-hydrogen collision has been investigated using a formulation based on three particle scattering. Second order matrix elements have been calculated taking 1s intermediate state of hydrogen atom into account. The effect of inclusion of second order terms is to raise the total cross-section results over Born results. The cross-section results have been compared with the results of calculations based on first Born, the two state approximation and convergent close coupling approach in the energy range 0.9-10 Ryd and with other available results in an energy range 30-2000 eV.
Page(s): 245-250
ISSN: 0019-5596
Appears in Collections:IJPAP Vol.46(04) [April 2008]

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