Dynamic Multipole Polarizabilities of Two- and Four-Electron Atomic Systems
Journal Article
·
· Physical Review, A (General Physics)
Dynamic multipole polarizabilities of a number of simple atomic closed- shell systems in their ground states have been calculated within the coupled time- dependent Hartree-Fock scheme. The systems here investigated include He, Li+ , Be2+, B3+, C4+, Be, B+, and C2+. In order to acquire some feeling about the obtained results, the dipole polarizabilities have been evaluated either by using a scalar- or a vector-potential representation for the oscillating external field: these two choices give rise to the well-known polarizability expressions in terms of length'' and velocity'' oscillator strengths, respectively. Furthermore, a unitary transformation of the Hartree- Fock Hamiltonian is devised, which allows one to use a perturbation operator corresponding to that involved in the acceleration oscillator-strength expression. Estimates of transition energies to low-lying excited states have been also obtained from the frequency values at which the various polarizabilities display discontinuities.
- Research Organization:
- Istituto di Chimica Fisica dell'Universita di Pisa, Via Risorgimento 35, 56100 Pisa, Italy
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-29-006064
- OSTI ID:
- 4400450
- Journal Information:
- Physical Review, A (General Physics), Journal Name: Physical Review, A (General Physics) Journal Issue: 2 Vol. 8; ISSN 0556-2791
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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*BERYLLIUM-- POLARIZABILITY
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N60200* --Physics (Atomic & Molecular)--Atomic & Molecular Properties