Journal Article

Lifetime measurements of odd-parity high-excitation levels of Sm <span class="smallCaps">ii</span> by time-resolved laser spectroscopy

Wei Zhang, Yanyan Feng, Pengfei Li, Shan Du, Xinwen Ma, Xiubin Yang, Zhankui Jiang and Zhenwen Dai

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 416, issue 1, pages 547-552
Published in print September 2011 | ISSN: 0035-8711
Published online August 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19068.x
Lifetime measurements of odd-parity high-excitation levels of Sm ii by time-resolved laser spectroscopy

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Natural radiative lifetimes of 53 odd-parity highly excited levels of singly ionized samarium in the energy range 26 599.08–36 107.66 cm−1 have been measured by the time-resolved laser-induced fluorescence technique in an ionic plume produced by laser ablation. The fundamental frequency and second harmonic of a dye laser have been adopted as the tunable exciting source (308–650 nm), and a fast detection system has been used to record fluorescence signals. The lifetime values obtained in this paper are in the range 10.5–271 ns. A good agreement between the present results and the previously published values was achieved. This work will be useful for investigating the composition of chemically peculiar stars.

Keywords: atomic data; atomic processes; methods: laboratory; techniques: spectroscopic

Journal Article.  2979 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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