Wavelengths, energy levels and HFS in Ho II
2009 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 79, no 3, 035306- p.Article in journal (Refereed) Published
We recorded spectra of Ho II emitted by hollow-cathode lamps, using the ultraviolet Fourier transform spectrometer (FTS) at Lund Observatory and the 2-m FTS at the National Institute of Standards and Technology. The combined wavenumber coverage spans the interval from 8000 cm-1 to 49600 cm-1(12500 Å to 2016 Å). We measured 303 lines in these spectra and used them to determine energies and hyperfine structure constants of 100 levels. Ofthese, 41 energy levels have not been reported previously and hyperfine structure constants have not been reported previously for 83 levels. Comparisonsbetween the hyperfine structure constants and energy levels presented in this article and those previously determined from other studies are included anddiscrepancies are discussed. A theoretical study of the odd-parity levels leads to hyperfine structure parameters and to predictions for unknown excited levelsof the ground-state configuration.
Place, publisher, year, edition, pages
2009. Vol. 79, no 3, 035306- p.
Atom and Molecular Physics and Optics
Research subject Physics
IdentifiersURN: urn:nbn:se:su:diva-27771DOI: 10.1088/0031-8949/79/03/035306ISI: 000263891000013OAI: oai:DiVA.org:su-27771DiVA: diva2:218004