ANTIPROTON AND PROTON IMPACT EXCITATION-IONIZATION OF HELIUM INCLUDING RESONANT DECAY

Authors
STRATON JC MCGUIRE JH GODUNOV AL
Citation
Jc. Straton et al., ANTIPROTON AND PROTON IMPACT EXCITATION-IONIZATION OF HELIUM INCLUDING RESONANT DECAY, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 143(1-2), 1998, pp. 225-232
Citations number
47
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
225 - 232
Database
ISI
SICI code
0168-583X(1998)143:1-2<225:AAPIEO>2.0.ZU;2-Z
Abstract
The cross section for projectile impact excitation-ionization of heliu m is calculated, including spatial correlation, time-ordering, and int erference between autoionizing and continuum states. The computational load is greatly reduced by using configuration-interaction (CI) heliu m wave functions and continuum pseudostates, yielding a scattering amp litude that is a sum of analytical terms for the first-order and energ y-conserving second- and third-order contributions, and a one-dimensio nal integral for the energy-nonconserving second-order contributions. Comparison is made with experiment. (C) 1998 Published by Elsevier Sci ence B.V. All rights reserved.