Departmental Seminar

Electron-impact excitation of molecular hydrogen: dissociation and vibrationally resolved cross sections

Professor Dmitry Fursa
Department of Physics and Astronomy, Curtin University

Molecular hydrogen and its isotopologues are present in a range of vibrationally excited states in fusion, atmospheric, and interstellar plasmas. Electron-impact excitation cross sections resolved in both final and initial vibrational levels of the target are required for modeling the properties and dynamics, and controlling the conditions of many low-temperature plasmas. Recently, the convergent close-coupling (CCC) method has been utilized to provide a comprehensive set of accurate excitation, ionization, and grand total cross sections for electrons scattering on H2 in the ground (electronic and vibrational) state, and calculations are being conducted to extend this data set to include cross sections resolved in all initial and final vibrational levels. In this talk I will review the available e-H2 collision data, discuss the resolution of a significant discrepancy between theory and experiment for excitation of the b3u+ state, and present estimates for dissociation of H2.

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