Analysis of rotational coupling in collisions of Li+ with Ne leading to double excitation of Ne

M. Oud, Ernst S. Kooij, W.B. Westerveld, A. Niehaus

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Abstract

Electron angular distributions due to autoionization of Ne, doubly excited to the (2p43s2)1D state in collisions with Li+ in the energy range 1.2-2.2 keV, are measured in coincidence with Li+ scattered into a well defined direction ( Phi =0 degrees , Theta cm=10.8 degrees ). The experimental findings are analysed with the help of a collision model proposed earlier. In this model the initial excitation occurs by radial diabatic coupling to a molecular Sigma -state at small distances, followed by rotational coupling to Pi - and Delta -states at intermediate distances in the second half of the collision. The energy splitting between the Sigma -, Pi - and Delta -states is described by a model function. By adapting two parameters of this model function, the experimental findings can be reproduced within the experimental error in numerical calculations involving the relevant set of coupled differential equations.
Original languageUndefined
Pages (from-to)415
JournalJournal of physics B: atomic, molecular and optical physics
Volume28
Issue number3
DOIs
Publication statusPublished - 1995

Keywords

  • IR-75159

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