ON THE STUDY OF THE CRITICAL ANGLE IN ELASTIC POSITRON-HYDROGEN COLLISIONS

Authors
MANDAL P KAR S ROY U
Citation
P. Mandal et al., ON THE STUDY OF THE CRITICAL ANGLE IN ELASTIC POSITRON-HYDROGEN COLLISIONS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 143(1-2), 1998, pp. 32-36
Citations number
24
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical","Physics, Nuclear
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
143
Issue
1-2
Year of publication
1998
Pages
32 - 36
Database
ISI
SICI code
0168-583X(1998)143:1-2<32:OTSOTC>2.0.ZU;2-Z
Abstract
The elastic differential cross-section in positron-hydrogen collisions is computed in the energy range 0.136-30.6 eV utilising accurate phas eshifts and partial-wa iie amplitudes given by the Kohn-Hulthen and Sc hwinger variational methods. Surface plots of the differential cross-s ection thus obtained indicate rich structure. Critical angles appear d ue to the destructive interference of the partial-wave contributions t o the scattering amplitude for positron momenta just beyond 0.31 (a.u. ). (C) 1998 Elsevier Science B.V. All rights reserved.