Hyperfine-interaction-dependent 4s4p ³P₂ lifetimes in Zn-like ions

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M. Andersson, Y. Liu, C. Y. Chen, R. Hutton, and Y. Zou
The Key Laboratory of Applied Ion Beam Physics, Ministry of Education, Shanghai, People's Republic of China, and Shanghai EBIT Laboratory, Institute of Modern Physics, Fudan University, Shanghai, People's Republic of China

T. Brage
Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden

Received 23 July 2008; published 15 December 2008

Theoreticalstudies on hyperfine-interaction-dependent lifetimes of the 4s4p ³P₂ states of Zn-likeions are reported in this paper. A systematic investigation alongthe isoelectronic sequence shows that the lifetime of the 4s4p ³P₂level is very sensitive to hyperfine interaction at the beginningof the sequence, but gets less sensitive going to thehigher end. The intensity ratio between the 4s² ¹S₀-4s4p ³P₂ and the4s4p ³P₁-4s4p ³P₂ transitions was also investigated and it is shown thatthis ratio is very sensitive to hyperfine interaction. In someisotopes the two branches are dominated by transitions from differentupper hyperfine levels. Our research also reveals that the hyperfine-inducedelectric dipole transitions contribute to the transitions of 4s² ¹S₀-4s4p ³P₂ atabout the same level as, or even higher than, M2transitions whenever the nucleus has a spin. This is trueall along the isoelectronic sequence.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.78.062505
DOI:	10.1103/PhysRevA.78.062505
PACS:	31.10.+z; 31.15.A-; 32.10.Fn; 32.70.Cs 31.10.+z Theory of electronic structure, electronic transitions, and chemical binding in atoms and molecules 31.15.A- Ab initio calculations (atoms and molecules) 32.10.Fn Atomic fine and hyperfine structure 32.70.Cs Atomic oscillator strengths, lifetimes, transition moments YEAR: 2008
KEYWORDS:	electric moments, hyperfine interactions

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