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DIFFERENTIAL CROSS-SECTIONS FOR ELECTRONIC EXCITATION OF MOLECULAR-HYDROGEN USING THE R-MATRIX METHOD

BRANCHETT, SE; TENNYSON, J; MORGAN, LA; (1991) DIFFERENTIAL CROSS-SECTIONS FOR ELECTRONIC EXCITATION OF MOLECULAR-HYDROGEN USING THE R-MATRIX METHOD. J PHYS B-AT MOL OPT , 24 (15) 3479 - 3490.

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Abstract

Differential cross sections are calculated for electron-H-2 collisions for scattering energies up to 20 eV. Elastic scattering and excitation from the ground, X 1-SIGMA-g+, to the lowest six excited electronic states, b 3-SIGMA-u+, a 3-SIGMA-g+, c 3-PI-u, B 1-SIGMA-u+, E,F 1-SIGMA-g+ and C 1-PI-u, is explicitly considered for all total symmetries up to and including 2-PHI-g for a single fixed H-2 geometry. The target states are represented using a full configuration interaction treatment within a basis of Slater-type orbitals optimized to give accurate vertical excitation energies. Results are presented for both resonant and non-resonant differential cross sections. Comparison is made with the available experimental and theoretical data. Excellent agreement is obtained for elastic differential cross sections; agreement for the inelastic differential cross sections is only moderate. Possible improvements to these calculations are discussed.

Type:Article
Title:DIFFERENTIAL CROSS-SECTIONS FOR ELECTRONIC EXCITATION OF MOLECULAR-HYDROGEN USING THE R-MATRIX METHOD
Keywords:SCHWINGER MULTICHANNEL FORMULATION, IMPACT EXCITATION, NITROGEN MOLECULES, DIATOMIC-MOLECULES, ELASTIC-SCATTERING, B 3-SIGMA-U+, H-2, RESONANCES, STATES, COLLISIONS
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy

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