Europhys. Lett.
Volume 66, Number 3, May 2004
Page(s) 344 - 349
Section Atomic and molecular physics
Published online 01 April 2004
Europhys. Lett., 66 (3) , pp. 344-349 (2004)
DOI: 10.1209/epl/i2003-10209-9

New and revised energy levels of atomic niobium

S. Kröger1, O. Scharf1 and G. Guthöhrlein2

1  Institut für Atomare Physik und Fachdidaktik, Technische Universität Berlin Hardenbergstr. 36, D-10623 Berlin, Germany
2  Laboratorium für Experimentalphysik, Universität der Bundeswehr Hamburg Holstenhofweg 85, D-22043 Hamburg, Germany

(Received 19 December 2003; accepted in final form 18 February 2004)

For the element niobium, whose energy level structure was considered to be well known regarding the low-lying levels, the energy values of four low-lying levels, listed in Moore's tables of atomic energy levels, were found to be incorrect. The correct positions of these levels have been revealed, and, additionally, two new levels have been detected using laser-induced fluorescence spectroscopy in the wavelength region from 470 $\un{nm}$ to 505 $\un{nm}$.

32.10.Fn - Fine and hyperfine structure.
32.30.-r - Atomic spectra.

© EDP Sciences 2004