Polarizabilities of heliumlike ions in the1s2p1Pand1s2p

Properties of the triplet metastable states of the alkaline-earth-metal atoms

“…The present ␣ 0 of 46.66 a 0 3 is within 0.12% of the close to exact calculation of Yan et al [35]. Agreement with the TDGI ␣ 2,L 0 L 0 of Rerat and Pouchan [36] is not as good, but it should be noted that the TDGI calculation obtains an ␣ 0 of 49.5 a 0 3 , indicating that the Rerat-Pouchan calculation is not quite converged.…”

“…The program logic and associated numerics were initially tested by estimating the polarizabilities of the 1s2p 3 P o level of He. The present α 0 of 46.6 a 3 0 is within 0.2% of the close to exact calculation of Yan et al [35]. Agreement with the TDGI α 2,L 0 L 0 of Rerat and Pouchan [36] is not as good, but it should be noted that the TDGI calculation calculation obtains an α 0 of 49.5 a 3 0 , indicating that the Rerat-Pouchan calculation is not quite converged.…”

Calculations of the dynamic dipole polarizabilities for the Li + ion

“…[39] Combining the different convergent trends of the static dipole polarizability as N and ℓ max , an extrapolated value of 46.87980(1) a 3 0 is given in the last line of Table 3, which is in good agreement with the Hylleraas value of 46.8798023(7) a 3 0 . [36] Comparing our extrapolated result with the variationperturbation result of 46.8798 a 3 0 of Chen, [34] the first five digits are the same. For other triplet 2 3 P, 3 3 S, and 3 3 P states, the final extrapolated values of static dipole polarizabilities are listed in the first line of the Table 4.…”

“…For example, the static dipole polarizability for the 2 3 S and 2 3 P states can be found in Refs. [34]- [36], only two works [37,38] about the dynamic polarizabilities for the 2 3 S state were published, and there has been no work reported for the dynamic dipole polarizabilities of other triplet states of the Li + ion in the literature.…”

Theory and applications of atomic and ionic polarizabilities

“…6860( 25) [362] Better information about the specific values of the dispersion coefficients for many atoms has become available primarily because of the importance of such data for the field of cold-atom physics. There have been the near exact non-relativistic calculation by Yan and co-workers on H, He and Li using Hylleraas basis sets [117,118,[365][366][367][368][369]. An important series of calculations on the ground and excited states of the alkali atoms were reported by Marinescu and co-workers [358,[370][371][372][373].…”