caa a22 4500 445865237 CHVBK 20180317145455.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1140/epjd/e2011-20166-4 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-20166-4 ns → n′s transition of hydrogen atom by positron impact with screened Coulomb interactions [Elektronische Daten] [S. Nayek, A. Ghoshal] We have made an investigation on H(ns)→H(n′ s) transition processes by positron impact with screened Coulomb potentials (SCP) by employing a distorted-wave formalism in the momentum space. Making use of simple variational wave functions of the hydrogen atom interacting with SCP we have been able to obtain the partial-wave scattering amplitudes in closed analytical forms. We have then used these distorted-wave scattering amplitudes to make a detailed study on differential and total cross sections in the energy range 20-300eV. This study reveals some hitherto unknown features of the differential and total cross section. To the best of our knowledge such a study on the differential and total cross sections for inelastic positron-hydrogen collisions with SCP is reported for the first time in the literature. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Nayek S. Department of Mathematics, Burdwan University Golapbag, Burdwan, 713 104, West Bengal, India aut Ghoshal A. Department of Mathematics, Burdwan University Golapbag, Burdwan, 713 104, West Bengal, India aut The European Physical Journal D Springer-Verlag 64/2-3(2011-10-01), 257-268 1434-6060 64:2-3<257 2011 64 10053 https://doi.org/10.1140/epjd/e2011-20166-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-20166-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nayek S. Department of Mathematics, Burdwan University Golapbag, Burdwan, 713 104, West Bengal, India aut NATIONALLICENCE 700 1- Ghoshal A. Department of Mathematics, Burdwan University Golapbag, Burdwan, 713 104, West Bengal, India aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 64/2-3(2011-10-01), 257-268 1434-6060 64:2-3<257 2011 64 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer