State-to-state cross sections for electron impact on N/sub 2/. Close coupling and polarized Born calculations for rotational and vibrational excitation and pure elastic scattering at nonresonant energies

Journal Article · Fri Dec 14 23:00:00 EST 1979 · J. Chem. Phys.; (United States)

OSTI ID:5865464

Onda, K; Truhlar, D G

Calculations of cross sections for elastic scattering, rotational excitation, and vibrational excitation of ground state N/sub 2/ by electrons with impact energies of 10 and 50 eV have been performed using realistic static-exchange-plus-polarization interaction potentials, rotational close coupling, and the vibrational sudden approximation. The effect of vibrational averaging on the elastic scattering is found to be small. The calculated integral cross sections for pure elastic scattering and for pure rotational (summed over j'not =0), pure vibrational (j'=0,v'=1 and 2), and mixed rotational--vibrational (summed over j'not =0 for v'=1 and 2) excitation are 34.4, 18.6, 2.70 x 10/sup -2/, and 4.13 x 10/sup -2/ a/sub 0//sup 2/, respectively, at 10 eV and 19.4, 11.7, 1.28 x 10/sup -2/, and 6.92 x 10/sup -2/ a/sub 0//sup 2/, respectively, at 50 eV. The sum of the differential cross sections for pure vibrational and mixed rotational--vibrational excitation for v=0..-->..v'=1 can be compared to experiment and agreement is good at both energies except for scattering angles theta< or =30/sup 0/. The pure rotational excitation differential cross section has not been resolved experimentally but we predict that it is dominated by j'=2 at 10 eV and for theta< or =130/sup 0/ at 50 eV and j'=4 for larger theta at 50 eV. The calculated state-to-state cross sections are also compared to results calculated by the polarized Born approximation with simplified model potentials based on the long-range forces.

• Research Organization: Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
• OSTI ID: 5865464
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 71:12; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
BORN APPROXIMATION
COLLISIONS
CRYOGENIC FLUIDS
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EXCITATION
EXCITED STATES
FLUIDS
MOLECULE COLLISIONS
NITROGEN
NONMETALS
ROTATIONAL STATES
SCATTERING
VIBRATIONAL STATES