The anisotropic interaction of He-C2H2 from differential scattering experiments

The anisotropic interaction of He-C2H2 from differential scattering experiments

The anisotropic potential energy surface of He–C2H2 is determined by analyzing total differential cross sections measured at E=71.3 meV and differential energy loss spectra obtained at two energies, E=102.9 and 62.0 meV. Calculations are carried out using infinite-order-sudden, coupled states, and c...

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Veröffentlicht in:The Journal of chemical physics 1993-09, Vol.99 (5), p.3494-3502
Hauptverfasser: BUCK, U, ETTISCHER, I, SCHLEMMER, S, MOONBONG YANG, VOHRALIK, P, WATTS, R. O
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Sprache:eng
Schlagworte:
Atomic and molecular collision processes and interactions
Atomic and molecular physics
Exact sciences and technology
Excited states
Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
Physics
Potential energy surfaces for collisions
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container_end_page 3502
container_issue 5
container_start_page 3494
container_title The Journal of chemical physics
container_volume 99
creator BUCK, U
ETTISCHER, I
SCHLEMMER, S
MOONBONG YANG
VOHRALIK, P
WATTS, R. O
description The anisotropic potential energy surface of He–C2H2 is determined by analyzing total differential cross sections measured at E=71.3 meV and differential energy loss spectra obtained at two energies, E=102.9 and 62.0 meV. Calculations are carried out using infinite-order-sudden, coupled states, and close coupling methods. The data evaluation clearly demonstrates that the experimental results are much better reproduced by a spindle-shaped contour in the repulsive potential than by the more usual hard ellipsoidal shape. This change also explains the unusually small damping of the diffraction oscillations in the total differential cross section.
doi_str_mv 10.1063/1.466172
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subjects Atomic and molecular collision processes and interactions
Atomic and molecular physics
Exact sciences and technology
Excited states
Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
Physics
Potential energy surfaces for collisions
title The anisotropic interaction of He-C2H2 from differential scattering experiments
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