Eur. Phys. J. D 44, 327-335 (2007)
https://doi.org/10.1140/epjd/e2007-00183-8

Rydberg transitions for positron-hydrogen collisions

¹ Department of Mathematics, Burdwan University, Golapbag, Burdwan 713 104, West Bengal, India
² Department of Mathematics, Visva-Bharati University, Santiniketan 731 235, West Bengal, India

Corresponding author: ^a puspajit2001@yahoo.com

Received: 19 January 2007
Revised: 19 April 2007
Published online: 6 June 2007

Abstract

e⁺ + H(ns) ↦e⁺ + H(n^′s) transitions for arbitrary n and n^′ have been studied using the distorted-wave formalism in the momentum space [Ghoshal and Mandal, Phys. Rev. A 72, 032714 (2005)]. The distorted-wave scattering amplitudes have been written in a simple closed analytical form. A detailed study has been made on differential and total cross sections in the energy range 20–300 eV. Resonance-like behaviour of the differential cross section has been observed in the the region of lower scattering angles for high Rydberg transitions. To the best of our knowledge the distorted-wave results for differential and total cross sections for such arbitrary transitions are reported for the first time in the literature.