CHINESE JOURNAL OF PHYSICS VOL. 39, NO. 1 FEBRUARY 2001

Calculations for Transition Rates of Beryllium-like Ions

Hsiang-Shun Chou

Institute of Optoelectronic Sciences, National Taiwan Ocean University,

Keelung, Taiwan 202, R.O.C.
(Received November 24, 2000)

Transition rates for the electric dipole transitions in Be-like ions are determined to the second order within the framework of relativistic many-body perturbation theory. The transition rates obtained in different gauges are in close agreement. The theoretical transition rates agree well with experiments for all ions except for the neutral Be atom.

PACS. 32.70.Cs $\;$- Oscillator strengths, lifetimes, transition moments.
PACS. 31.15.Md - Perturbation theory.
PACS. 31.25.-v $\;$- Electron correlation calculations for atoms and molecules.
PACS. 31.30.Jv $\;\,$- Relativistic and quantum electrodynamic effects in atoms and molecules.

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