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Low-energy electron scattering from molecular hydrogen: Excitation of the X 1 Sg+ to b 3 Su+ transition

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Authors
Zawadzki, M.
Wright, R.
Dolmat, G.
Martin, M.
Diaz, B.
Hargreaves, L.
Coleman, D.
Fursa, Dmitry
Zammit, M.
Scarlett, Liam
Tapley, J.
Savage, J.
Bray, Igor
Khakoo, M.
Date
2018
Type
Journal Article

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Zawadzki, M. and Wright, R. and Dolmat, G. and Martin, M. and Diaz, B. and Hargreaves, L. and Coleman, D. et al. 2018. Low-energy electron scattering from molecular hydrogen: Excitation of the X 1 Sg+ to b 3 Su+ transition. Physical Review A - Atomic, Molecular, and Optical Physics. 98 (6): Article ID 062704.
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Physical Review A - Atomic, Molecular, and Optical Physics
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School of Electrical Engineering, Computing and Mathematical Science (EECMS)
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Abstract

We present time-of-flight differential cross-section measurements and convergent close-coupling calculations of differential cross sections for the electron-impact excitation of the XSg+1?bSu+3 transition in molecular hydrogen. A part of this work was recently published [M. Zawadzki, Phys. Rev. A 97, 050702(R) (2018)10.1103/PhysRevA.97.050702]. In this work, agreement between theory and experiment is excellent overall, and marks a transition in electron-molecule scattering where differential scattering of excitation is found to be in such precise agreement. We also present total electron-impact excitation differential cross sections for H2 for which agreement between theory and experiment is found to be excellent.