Projectile Interactions in Theoretical Triple Differential Cross Sections for Simultaneous Excitation-Ionization of Helium
The importance of projectile interactions in triple differential cross sections (TDCS) is explored for the problem of simultaneous excitation-ionization of helium by electron impact using a new approach that we call the four-body distorted wave model (4DW). The 4DW model includes all projectile interactions, namely initial- and final-state projectile-target interactions, and the post-collision interaction between the two continuum electrons. Results are presented for an incident electron energy of 500 eV and are compared to experimental data, as well as a second-order R-matrix theory and the first Born approximation. Results for absolute TDCS ratios of ionization without excitation to excitation-ionization are also presented.
M. Foster et al., "Projectile Interactions in Theoretical Triple Differential Cross Sections for Simultaneous Excitation-Ionization of Helium," Journal of Physics B: Atomic, Molecular and Optical Physics, Institute of Physics - IOP Publishing, Jul 2008.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/41/13/135203
National Science Foundation (U.S.)
Keywords and Phrases
Atomic Physics; Molecular Physics
Article - Journal
© 2008 Institute of Physics - IOP Publishing, All rights reserved.