Electron angular distribution in ionization of helium by ion impact: a four-body distorted wave model

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

Salamanca, España

Conferencia; ECAMP 2010 - 10th International Conference on Atoms, Molecules and Photons; 2010

<!-- @page { margin: 2cm } P { margin-bottom: 0.21cm } -->Three-body distorted wave models like the continuum distorted wave [1] and the continuum distorted wave-eikonal initial state (CDW-EIS) [2] ones were proposed to study monoelectronic targets. Fainstein et al. [3] extended the CDW-EIS description for multielectronic targets, but reducing the multielectronic case to a monoelectronic one within a three-body approximation. The three considered bodies are the incident projectile, the residual target and the active electron (the one to be ionized as a consequence of the collision). The other electrons, the passive ones, are assumed to remain as frozen in their initial orbitals during the reaction (see [3]). Four-body distorted wave models were also introduced to study ionization of dielectronic targets [4, 5]. Correct boundary conditions were preserved in both entry and exit channels but only the active electron was considered to be distorted by the projectile. In order to avoid any asymmetric description of the target electrons, in a previous work [6], we consider both of them as active electrons in a four-body Distorted Wave-Eikonal Initial State (4B-DW-EIS) approximation. The use of four body representations, where the two electrons are considered as active ones, allows the study of electron correlation on multiple differential and total cross sections. Following the same philosophy as in [6] results for double differential cross sections as a function of the emission angle for the case of a bare ion impact on a He target will be presented during the conference. References: [1] Belkić Dž 1978 J. Phys. B: At. Mol. Phys. 11 3529 [2] Crothers D S F and McCann J F 1983 J. Phys. B: At. Mol. Phys. 16 3229 [3] Fainstein P D, Ponce V H and Rivarola R D 1988 J. Phys. B: At. Mol. Opt. Phys. 21 287 [4] Belkić Dž 1997 J. Phys. B: At. Mol. Phys. 30 1731 [5] Belkić Dž 1997 Nucl. Instr. Meth. B 124 365 [6] Monti J M, Fojón O A, Hanssen J and Rivarola R D 2009 J. Phys. B: At. Mol. Opt. Phys. 42 195201