Journal Article

Radiative lifetimes of highly excited even-parity levels in Gd <span class="smallCaps">i</span> and Gd <span class="smallCaps">ii</span>

Yanyan Feng, Liyun Jiang, Qian Wang, Wei Zhang, Zhankui Jiang and Zhenwen Dai

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 418, issue 2, pages 998-1003
Published in print December 2011 | ISSN: 0035-8711
Published online November 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19548.x
Radiative lifetimes of highly excited even-parity levels in Gd i and Gd ii

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Radiative lifetimes of 94 high-lying even-parity levels from 29 717.231 to 41 692.155 cm−1 of Gd i and 10 high-lying even-parity levels from 38 057.954 to 49 291.082 cm−1 of Gd ii, have been measured using time-resolved laser-induced fluorescence method. The lifetime values range from 7.1 to 220 ns for Gd i and from 5.2 to 47.4 ns for Gd ii. Most results reported here lie within the uncertainty of ±5 per cent. Free neutral and singly ionized gadolinium atoms were generated by laser ablation. The second harmonic of different dye lasers was employed as the tunable UV exciting source (242–337 nm) to excite the investigated levels. A good agreement between our results and the previous ones was achieved.

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

Journal Article.  2704 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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