Lifetimes and hyperfine structures in Ho II

Details Lifetimes and hyperfine structures in Ho II Lifetimes and hyperfine structures in Ho II

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phys...42..569w&link_type=abstract

Physica Scripta (ISSN 0031-8949), vol. 42, no. 5, Nov. 1990, p. 569-573.

Physics

13

Atomic Excitations, Holmium, Hyperfine Structure, Atomic Structure, Laser Spectroscopy, Ultraviolet Lasers

Scientific paper

Lifetimes, oscillator strengths and hyperfine structures in Ho II are measured. Accurate atomic structure data are of importance for element identification in stellar atmospheres as well as in atomic structure studies. Lifetimes of 3 excited levels, all observed in stellar spectra, have been measured using electro-optic modulation spectroscopy in the ultraviolet. Oscillator strengths have furthermore been extracted by analyzing the time evolution of the laser excitation in the Rabi-regime. Previous to this study no lifetime and oscillator strength data were known in Ho II. In addition, the hyperfine structures of 3 low odd levels and 2 excited levels, has been accurately measured using fast beam laser spectroscopy.

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