Resonance-enhanced dissociation of a molecular ion below its electronic excitation threshold
- Department of Applied Science, University of California Davis, Livermore, California 94550 (United States)
- Theoretical Atomic and Molecular Physics Group, Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
A mechanism for dissociative excitation (DE) of molecular ions via autoionizing resonances is discussed. This mechanism produces dissociation at collision energies below the excitation threshold for the ion{close_quote}s dissociative states and can alter the dissociation products. Calculated DE cross sections for {sup 4}HeH{sup +} and {sup 3}HeD{sup +} between 5 and 25 eV contain contributions from several resonances and agree well with the recent measurements by Str{umlt o}mholm {ital et} {ital al}. [Phys. Rev. A (to be published)]. In this completely {ital ab} {ital initio} study the electronic scattering parameters came from complex Kohn variational calculations and a quantum wave-packet treatment was used for the dissociation dynamics. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 401137
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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