ELECTRON CORRELATION IN THE DOUBLE-EXCITATION OF THE HELIUM ATOM BY FAST CHARGED-PARTICLES

Authors
NAGY L BODEA D
Citation
L. Nagy et D. Bodea, ELECTRON CORRELATION IN THE DOUBLE-EXCITATION OF THE HELIUM ATOM BY FAST CHARGED-PARTICLES, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 124(2-3), 1997, pp. 401-404
Citations number
18
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
124
Issue
2-3
Year of publication
1997
Pages
401 - 404
Database
ISI
SICI code
0168-583X(1997)124:2-3<401:ECITDO>2.0.ZU;2-C
Abstract
Double excitation cross sections to the 2s2p state of the helium atom by rast proton and antiproton impact are calculated by perturbation ex pansion through second order. The initial and the final states are des cribed by correlated wavefunctions. The importance of different mechan isms and of the electron correlation is analyzed. Cross sections for n egative projectiles are found to be higher than those for positive pro jectiles. The present results are compared with other theoretical calc ulations and with the experimental data.