A Complete Postversion of the Three-Body Continuum Distorted Wave-Eikonal Initial State Approximation for Single Ionization of Multielectron Atoms

MONTI, JUAN MANUEL; FOJÓN, OMAR ARIEL; HANSSEN, JOCELYN; RIVAROLA, ROBERTO DANIEL

Journal of Atomic, Molecular, and Optical Physics

Hindawi Publishing Corporation

Lugar: Nueva York; Año: 2010 vol. 2010 p. 1 - 7

1687-9236

Single electron ionization of helium targets produced by the impact of fast proton beams is investigated. The postversion of the continuum distorted wave-eikonal initial state into a three-body approximation is reformulated, including the dynamic screening produced by the nonionized electron. This dynamic screening is shown to play a main role in the determination of double differential cross-sections. A good agreement is found with predictions obtained employing the prior version of the model, so that post-prior discrepancies are almost eliminated.