Hyperfine-state-dependent lifetimes along the Ni-like isoelectronic sequence

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M. Andersson, K. Yao, R. Hutton, Y. Zou, and C. Y. Chen
The Key Laboratory of Applied Ion Beam Physics, Ministry of Education, 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 15 January 2008; published 29 April 2008

Aninvestigation of the lifetime of the 3d⁹4s ³D₃ level along apart of the nickel-like isoelectronic sequence has been performed. Thefocus of this work has been to evaluate the importanceof the hyperfine induced electric quadrupole channel of the 3d¹⁰ ¹S₀−3d⁹4s ³D₃transition for isotopes with nuclear spin. Comparisons between the magneticoctupole transition rate and the hyperfine-induced electric quadrupole transition rateshows that the hyperfine quenching is of importance along thewhole isoelectronic sequence. At the low-Z end the hyperfine inducedelectric quadrupole transition channel dominates, being several orders of magnitudelarger than the rate for the magnetic octupole transition channel,while for higher Z the two rates are of comparablesize.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.77.042509
DOI:	10.1103/PhysRevA.77.042509
PACS:	31.30.Gs; 31.10.+z; 32.70.Cs 31.30.Gs Hyperfine interactions and isotope effects in atoms and molecules 31.10.+z Theory of electronic structure, electronic transitions, and chemical binding in atoms and molecules 32.70.Cs Atomic oscillator strengths, lifetimes, transition moments YEAR: 2008
KEYWORDS:	hyperfine interactions, isoelectronic series, isotopes, radiative lifetimes

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