Nonperturbative treatment of multielectron processes in ion-molecule scattering: Application to He{sup 2+}-H{sub 2} collisions
- Laboratoire de Chimie Physique - Matiere et Rayonnement, UMR 7614, UPMC Universite Paris 6, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05 (France)
We present a nonperturbative theory to describe multielectronic processes occurring in the course of collisions between an ion and a molecule. The approach is based on the expansion of the electronic scattering wave function onto asymptotic mono- or multicenter states with proper translational conditions and includes both static and dynamical electronic correlations. Therefore, it has a wide application range around intermediate impact velocities v{approx_equal}v{sub e}, where v{sub e} is the averaged electron velocity in the initial state. As a first application, we report results on single- and double-electron capture processes in He{sup 2+}-H{sub 2} collisions for impact energies ranging from 0.01 to 25 keV/u. Special emphasis on the prediction of cross sections for double-electron capture into doubly excited states of helium is addressed.
- OSTI ID:
- 22093541
- Journal Information:
- Physical Review. A, Vol. 84, Issue 5; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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