Fine-structure transitions in the exit channel of optical collisionsC. Figl1, J. Grosser1, O. Hoffmann1 and F. Rebentrost2
1 Institut für Atom- und Molekülphysik, Universität Hannover 30167 Hannover, Germany
2 Max-Planck-Institut für Quantenoptik - 85748 Garching, Germany
received 21 September 2004; accepted in final form 24 November 2004
published online 5 January 2005
We study collisions by laser excitation of the collision pair in a differential scattering experiment. The relative population of the K( 4p) 2P fine-structure sublevels reflects the nonadiabatic coupling in the convergence region of the interaction potentials and illustrates the energy dependence of the nonadiabatic transition probability. Close coupling scattering calculations show a very good agreement with the experimental results, indicating a corresponding accuracy of the available potential data. The spin-orbit interaction in the coupling region is found to be not significantly different from the free atom value.
34.50.Rk - Laser-modified scattering and reactions.
31.50.Gh - Surface crossings, non-adiabatic couplings.
34.20.-b - Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions.
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