Calculations of energy levels and lifetimes of low-lying states of barium and radium
V. A. Dzuba, J. S. M. Ginges
Abstract
We use the configuration interaction method and many-body perturbation theory to perform accurate calculations of energy levels, transition amplitudes, and lifetimes of low-lying states of barium and radium. Calculations for radium are needed for the planning of measurements of parity and time invariance violating effects which are strongly enhanced in this atom. Calculations for barium are used to control the accuracy of the calculations.
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