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1.	Grafström, Peter, et al. (author) Hyperfine structure and isotope shift of highly excited barium-I states 1982 In: Zeitschrift für Physik A Hadrons and Nuclei. - 0939-7922. ; 306:4, s. 281-284 Journal article (peer-reviewed)abstract High-resolution laser-spectroscopy measurements of hyperfine structure and isotope shifts were performed for the 6snd 1 D 2 sequence of Ba-I in the regionn=12–24. Stepwise laser excitations of a collimated atomic beam were used. A strong influence on the hyperfine structure is observed at the perturbation atn=14, caused by interaction with the 5d7d configuration. Whereas the isotope shift for the even isotopes stays essentially constant with increasingn, the odd isotopes exhibit a strong change, indicating hyperfine-induced shifts. Interesting discussions with Prof. E. Matthias in the final stage of this work are gratefully acknowledged. This work was supported by the Swedish Natural Science Research Council.
2.	Jönsson, G., et al. (author) Natural radiative lifetimes in the 3 sns 1S0 and 3 snd 1D2 sequences of magnesium 1984 In: Physical Review A. ; A30:5, s. 2429-2432 Journal article (peer-reviewed)abstract Natural radiative lifetimes have been determined in the determined in the 3 sns 1S0 (n=4-15) and the 3 snd 1D2 (n=3-15) sequences of Mg I employing a pulsed-laser system. The radiative lifetimes in the 1S0 sequence and of the higher members in the 1D2 sequence are unperturbed and scale as (n)2.6 (where n is the effective principal quantum number), while the lifetimes of the lower members in the 1D2 sequence are perturbed by the doubly excited 3p2 configuration. The measured lifetimes are compared with available theoretical calculations, and a very good agreement is obtained.

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Type of publication: journal article (2)

Type of content: peer-reviewed (2)

Author/Editor: Svanberg, Sune (2)Undo refine; Kröll, Stefan (2); Jönsson, G. (2)Undo refine; Persson, Anders (1); Lundberg, Hans (1); Grafström, Peter (1); show more...; Jiang, Zhankui (1); Levinson, Claes (1); show less...

University: Lund University (2)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (2)

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