Relativistic all-order calculations of energies and matrix elements for Li and
- 1 September 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 40 (5), 2233-2246
- https://doi.org/10.1103/physreva.40.2233
Abstract
Valence removal energies, hyperfine constants, and E1 transition amplitudes are calculated for the 2, 2, 2, and 3 states of Li and . This calculation is an extension of earlier second- and third-order many-body perturbation theory (MBPT) calculations, in which now an infinite subset of MBPT terms is evaluated using all-order methods. Agreement with experiment at the 0.01% level for energies, and at the 0.1% level for matrix elements, is found. Issues involved with those higher-order terms omitted by the technique are discussed.
Keywords
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