Formation of H(2p) and H(2s) in collisions of He+with H atoms
- 28 July 1994
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 27 (14) , 3037-3043
- https://doi.org/10.1088/0953-4075/27/14/036
Abstract
Cross sections for excitation of the H(2p) and H(2s) states in He+-H collisions have been determined within the energy range 2.5-25 keV amu-1. Measurements have been based on observations of both spontaneous and electric field induced Lyman alpha radiation emitted by excited H atoms in a modulated crossed beam system developed previously in this laboratory. The measurements usefully extend previous low energy measurements and allow comparison with a number of theoretical predictions. In general the theory fails to provide a satisfactory description of both the observed magnitude and strong energy dependence of the measured cross sections for this two-electron system.Keywords
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