Berlin 2001 – scientific programme
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A: Atomphysik
A 17: Posters Friday (Spectroscopy)
A 17.11: Poster
Friday, April 6, 2001, 12:30–15:00, AT3
Energies and autoionization widths in the lithium iso-electronic sequence — •Jørgen E. Hansen1 and Gilles Verbockhaven2 — 1Department of Physics and Astronomy, University of Amsterdam, Valckenierstraat 65, NL-1018 XE, Amsterdam, The Netherlands. — 2Department of Theoretical Chemistry, University of Nijmegen, The Netherlands
Energies and autoionization widths are presented for autoionizing states in Li I, Be II and B III lying between the 1s2 and the 1s2s 3S ionization limits. A configuration interaction expansion combined with a B-spline basis set has been used to compute the properties of the lowest 2Se, 2Po and 2De states which are, in the LS approximation, the only terms allowed to autoionize. The comparison with theoretical and experimental data shows the high accuracy of the B-spline approach applied to singly core-excited states. The error on the energies is found, in the case of Li I, to be well below 10 meV in general, while for Be II and B III, for which much less is known, the theoretical results points to the need for more accurate measurements. Several new identifications have been made and some identifications revised in the experimental data.