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Title: 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

Abstract

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'=4more » 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.« less

Authors:
;
Publication Date:
Research Org.:
Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
OSTI Identifier:
5865464
Resource Type:
Journal Article
Journal Name:
J. Chem. Phys.; (United States)
Additional Journal Information:
Journal Volume: 71:12
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRON-MOLECULE COLLISIONS; ELASTIC SCATTERING; EXCITATION; NITROGEN; BORN APPROXIMATION; EV RANGE 10-100; ROTATIONAL STATES; VIBRATIONAL STATES; COLLISIONS; CRYOGENIC FLUIDS; ELECTRON COLLISIONS; ELEMENTS; ENERGY LEVELS; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EV RANGE; EXCITED STATES; FLUIDS; MOLECULE COLLISIONS; NONMETALS; SCATTERING; 640304* - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

Onda, K, and Truhlar, D G. 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. United States: N. p., 1979. Web.
Onda, K, & Truhlar, D G. 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. United States.
Onda, K, and Truhlar, D G. Sat . "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". United States.
@article{osti_5865464,
title = {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},
author = {Onda, K and Truhlar, D G},
abstractNote = {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.},
doi = {},
journal = {J. Chem. Phys.; (United States)},
number = ,
volume = 71:12,
place = {United States},
year = {1979},
month = {12}
}