Accurate determination of the electric dipole matrix elements, lifetimes, polarizabilities and light-shift ratios in Ba+ and Ra+

Details Accurate determination of the electric dipole matrix elements, lifetimes, polarizabilities and light-shift ratios in Ba+ and Ra+ Accurate determination of the electric dipole matrix elements, lifetimes, polarizabilities and light-shift ratios in Ba+ and Ra+

2008-09-30

arxiv.org/abs/0809.5167v1

Physics

Atomic Physics

Scientific paper

We have employed the relativistic coupled-cluster theory to calculate the electric dipole matrix elements in the singly ionized barium (Ba$^+$) and radium (Ra$^+$). Matrix elements of Ba$^+$ are used to determine the light-shift ratios for two different wavelengths on which recent experiments are carried out. By combining the measured light-shift ratios and our calculations, we are able to estimate possible errors associate with the used matrix elements in Ba$^+$. Static polarizabilities of the low-lying states and lifetimes of the first excited P-states are also determined using these matrix elements in Ba$^+$. A similar approach has been followed to estimate the lifetimes and light-shift ratios in Ra$^+$.

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