Excitation of the 2s and 2p states of hydrogen in fast collisions of He+and H and H2
- 21 June 1977
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 10 (9) , 1679-1696
- https://doi.org/10.1088/0022-3700/10/9/018
Abstract
A modulated crossed-beam technique has been used to determine cross sections for the formation of H(2p) and H(2s) atoms in collisions of He+ with H and H2 within the energy range 5-26 keV. Measurements were based on observations of the Lyman- alpha radiation emitted from the crossed-beam region both in the presence of and in the absence of electric-field quenching of the 2s state. The polarization of the Lyman- alpha radiation has also been studied. H(2p) formation cross sections are considerably larger than those for H(2s) formation for targets of H2 and H and a general understanding of the He+-H case is possible in terms of a quasi-molecular model.Keywords
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