Abstract
Semiempirical model of van de Waals coefficients, C6, C 8 and C10 was developed for the estimation of alkali-metal and alkaline-earth-metal atoms. Comparision of the dispersion coefficients and relativistic many-body perturbation theory (MBPT) reveals that the method is capable of achieving a level of accuracy as compared to more computationaly intensive MBPT approach. The polarization parameters were computed from their respective oscillator strength sum-rules with the dipole, quadrapole, and octupole oscillator strengths from the ground state. The use of the constrained sum-rules to determine oscillator strength value distributions for the core electrons was also discussed.
| Original language | English |
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| Pages (from-to) | 52714.1-52714.16 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 68 |
| Issue number | 5 |
| Publication status | Published - 2003 |