Search for additional resonances in e--helium scattering below the first excitation threshold
- 1 June 1975
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 8 (8), 1245-1247
- https://doi.org/10.1088/0022-3700/8/8/015
Abstract
Apart from the well known 2S negative ion state found in e--He scattering, additional p and d wave resonances below the first excitation threshold have been reported by several authors. A careful experimental investigation of the differential cross section does not confirm these observations. If such resonances exist, their width should be smaller than 10 mu eV.Keywords
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