A new He-resonance in the excitation of the (2s2p)3P autoionising state by electrons
- 28 March 1985
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 18 (6) , L171-L174
- https://doi.org/10.1088/0022-3700/18/6/005
Abstract
Four He- resonances with all three electrons in the n=2 shell are accessible by electron impact from the He ground state but only two resonances have been identified unambiguously in electron-helium scattering experiments. Experimental evidence for the presence of a He- resonance at 59.90 eV in the excitation cross section of the He**(2s2p)3P autoionising state is presented and discussed.Keywords
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