A further study of highly excited resonances in He-
- 14 November 1987
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 20 (21) , L711-L715
- https://doi.org/10.1088/0022-3700/20/21/008
Abstract
High-resolution electron impact excitation studies of helium in the energy region just below the first ionisation threshold provide further evidence for the existence of a Rydberg series of doubly excited resonances. These measurements extended the work of Buckman et al (1983) to states in which both excited electrons have values of the principal quantum number n>or=8. The energies of these states show good agreement with the values predicted by a number of semi-empirical double-Rydberg formulae and with a recent quantum mechanical calculation.Keywords
This publication has 15 references indexed in Scilit:
- Double Rydberg formula and applications to doubly excited states of highly charged ionsPhysical Review A, 1987
- The Wannier two-electron ionisation ladder in many electron systems: the He1Podoubly excited statesJournal of Physics B: Atomic and Molecular Physics, 1986
- Doubly Excited States, Including New Classification SchemesPublished by Elsevier ,1986
- Wannier theory for doubly excited resonancesJournal of Physics B: Atomic and Molecular Physics, 1985
- An eleven-state electron-helium scattering calculationJournal of Physics B: Atomic and Molecular Physics, 1984
- Rydberg series of doubly excited resonances near the threshold for two-electron escapeJournal of Physics B: Atomic and Molecular Physics, 1984
- Highly-excited double Rydberg states of He-Journal of Physics B: Atomic and Molecular Physics, 1983
- Correlations of two excited electronsReports on Progress in Physics, 1983
- Comment on the resonances near the n=3 threshold in e--He scatteringJournal of Physics B: Atomic and Molecular Physics, 1979
- A study of resonance structure in helium using metastable excitation by electron impact with high energy resolutionJournal of Physics B: Atomic and Molecular Physics, 1977