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Hybrid theory and calculation of e-N2 scatteringA theory of electron-molecule scattering is developed which is a synthesis of close-coupling and adiabatic-nuclei theories. Specifically, the theory is close-coupling with respect to vibrational degrees of freedom and adiabatic-nuclei with respect to rotation. It can be applied to any number of partial waves required; the remaining ones can be calculated purely in one or the other approximation. A theoretical criterion based on fixed-nuclei calculations is given which indicates those partial waves and energy domains requiring the various approximations. The theory allows all cross sections (pure rotational, vibrational, simultaneous vibration-rotation, differential, and total) to be calculated, and explicit formulas for all these cross sections are given. The theory is applied to low-energy e-N2 scattering. The fixed-nuclei results are such that the criterion shows clearly that vibrational close coupling is necessary, but only for the Pi sub g partial wave. It is found that the close-coupling calculation for this wave gives rise to the substructure as well as the gross structure of the 2.4-eV resonance and that vibrational excitation cross sections are about twice as large as previously inferred.
Document ID
19760034478
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chandra, N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Temkin, A.
(NASA Goddard Space Flight Center Theoretical Studies Group, Greenbelt, Md., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Publication Information
Publication: Physical Review A - General Physics
Subject Category
Atomic And Molecular Physics
Accession Number
76A17444
Distribution Limits
Public
Copyright
Other

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