作者: B. K. Sahoo , B. P. Das
DOI: 10.1103/PHYSREVA.77.062516
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摘要: We investigate the role of electron correlation effects in electric-dipole polarizabilities ground states alkaline earth metals, helium, and ytterbium by employing relativistic coupled-cluster (RCC) theory. These are incorporated via residual Coulomb interaction to all orders RCC singles doubles approximations. The perturbed wave functions used calculations obtained directly solving first-order equations, thereby avoiding sum-over-states approach. Our results compared with other available experimental data.