Dipole polarizabilities of excited alkali-metal atoms and long-range interactions of ground- and excited-state alkali-metal atoms with helium atoms

Abstract

The scalar and tensor dynamic polarizabilities of the first excited 2 P 1/2,3/2 states of the alkali-metal atoms Na, K, and Rb are calculated using relativistic many-body perturbation theory. Comparison with experimental measurements of the static polarizabilities suggests that the errors in the theoretical predictions do not exceed 1%. The dynamic polarizabilities at imaginary frequencies are employed to calculate the long-range van der Waals coefficients for the interaction of ground-state helium atoms with the excited alkali-metal atoms to a probable error of less than 2%.

Photoassociation of a cold-atom-molecule pair. II. Second-order perturbation approach

“…of the sublevel nP λ 1 contains angular factors which are different for P → S and P → D transitions [14]. In the usual definition of the polarizability, an average is made over all the sublevels λ 1 leading to the disappearance of the angular factors which is not the case here.…”

Theoretical study of sodium and potassium resonance lines pressure broadened by helium atoms

“…The C 6 coefficients for long range interactions are taken from the latest theoretical calculations of Zhu et al [12]. The potential energy curves of the X 2 Σ, A 2 Π and B 2 Σ states are shown in Fig.…”

Structure and spectroscopy of ground and excited states of LiYb

“…͑4͒ cannot be applied directly because of the downward transition, 2 P to 2 S, in the Li atom. A correction can be made to separate it out 36 in the integrand of Eq. ͑4͒ or we may calculate C 6 by the sum-overoscillator strengths.…”