Electron-impact dissociative excitation of H sub 3 sup +
- Department of Applied Science, University of California-Davis, Livermore, California 94550 (United States)
We report the results of an {ital ab} {ital initio} calculation of the electron-impact dissociation of {ital H}{sub 3}{sup +} via excitation of the two lowest ({sup 3}{ital E}{prime},{sup 1}{ital E}{prime}) excited electronic states, for electron energies between 15 eV, the threshold for excitation of the first electronic state, {sup 3}{ital E}{prime}, and 20.7 eV, corresponding to the excitation energy of the third excited electronic state, {sup 1}{ital A}{sub 2}{sup {prime}{prime}}. The calculations, which were carried out using the complex Kohn variational method, employed extensive correlated target wave functions that accurately reproduced the energy levels and transition dipoles of the ground and excited states of the ion. All open channels were included explicitly in the scattering calculation. Closed-channel effects were included via an {ital ab} {ital initio} optical potential. The fixed-nuclei excitation cross sections were found to be dominated by a series of sharp resonance structures. However, when the cross sections are averaged over the Franck-Condon envelope of the ground vibrational state, these sharp features are no longer seen.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7034848
- Journal Information:
- Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 46:3; ISSN 1050-2947; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DISSOCIATION
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EXCITATION
HYDROGEN IONS
HYDROGEN IONS 3 PLUS
ION COLLISIONS
IONS
MOLECULAR IONS
RESONANCE
VARIATIONAL METHODS