CALCULATION OF THE ENERGY-LEVELS OF BARIUM USING B-SPLINES AND A COMBINED CONFIGURATION-INTERACTION AND MANY-BODY-PERTURBATION-THEORY METHOD

Authors
DZUBA VA JOHNSON WR
Citation
Va. Dzuba et Wr. Johnson, CALCULATION OF THE ENERGY-LEVELS OF BARIUM USING B-SPLINES AND A COMBINED CONFIGURATION-INTERACTION AND MANY-BODY-PERTURBATION-THEORY METHOD, Physical review. A, 57(4), 1998, pp. 2459-2465
Citations number
36
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
57
Issue
4
Year of publication
1998
Pages
2459 - 2465
Database
ISI
SICI code
1050-2947(1998)57:4<2459:COTEOB>2.0.ZU;2-U
Abstract
A recently developed method of precise atomic calculations [Phys. Rev. A 54, 3948 (1996)] which combines many-body perturbation theory with the configuration-interaction method is used to calculate the 24 lowes t energy levels of Pa. B-spline functions in a cavity of a finite radi us are used as a unified many-purpose basis set. The calculation repro duces the experimental removal energies for Pa within a fraction of a per cent. Advantages of the new method and B splines are discussed.