Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 26: Poster: Interaction of matter and collisions with ions
A 26.2: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
Mean-field description of bare- and dressed-ion collisions with neon atoms — •Gerald Schenk and Tom Kirchner — Department of Physics and Astronomy, York University, Toronto, Ontario, M3J 1P3, Canada
Motivated by the availability of new experimental data [1] we study multiple ionization and charge transfer processes in collisions of neon atoms with doubly- and triply-charged bare and dressed ions at intermediate energies (25 keV/u to 1 MeV/u). In the case of dressed-ion impact, electrons are present on both centres in the initial state. We address this in an independent-particle-model approach, the many-electron system is represented by a single mean field. Electrons of both the target and the projectile are propagated in a common potential using the same basis set to ensure the orbitals remain orthogonal throughout. This allows to represent the combined system in terms of a standard single Slater determinant and to obtain exclusive transition probabilities for all final configurations in a consistent fashion.
The present study expands on recent work for B2+-Ne [2],
in which we examined the role of active projectile electrons for projectile charge state coincident multiple target ionization,
in several respects:
(i) additional collision channels are considered;
(ii) time-dependent response is taken into account;
(iii) comparisons with equicharged bare ions are
carried out in order to shed more light on
the role of the (active and passive) projectile electrons.
[1] W. Wolff et al, Phys. Rev. A 84, 42704; Ihani et al, J. Phys. B 46, 115208.
[2] G. Schenk et al, Phys. Rev. A 88 012712.