Diagrammatic many-body perturbation theory applied to highly ionized atoms of the copper isoelectronic sequence
- 1 September 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 20 (3), 951-963
- https://doi.org/10.1103/physreva.20.951
Abstract
Many-body diagrammatic perturbation theory has been applied to the calculation of ionization energies and multiplet strengths for two highly ionized atoms of the copper isoelectronic sequence. A unified Hartree-Fock zeroth-order Hamiltonian the eigenfunctions of which include both open- and closed-shell orbitals has been constructed for systems with a single open shell. Correlation energies for the excited states as well as the ground states of Kr VIII and Mo XIV were computed by means of individual basis sets generated for each state. The distribution of the correlation energy among second- and higher-order terms differed significantly for the two ions. In Mo XIV, most of the correlation energy was concentrated in second-order, with small third-order effects. In Kr VIII, however, second-order results were substantially changed by higher-order diagrams, particularly in the case of the state. Correlated multiplet strengths for the resonance transition were computed, including first-order corrections to the Hartree-Fock zeroth-order wave functions for both initial and final states. The results of these calculations are in excellent agreement with those of recent multiconfiguration Hartree-Fock calculations.
Keywords
This publication has 14 references indexed in Scilit:
- Theoretical simulation of beam-foil decay curves for resonance transitions of heavy ionsPhysical Review A, 1978
- Oscillator strengths for2S-2P transitions in the copper sequenceJournal of Physics B: Atomic and Molecular Physics, 1977
- Oscillator strengths of resonance lines in Br(VI), (VII) and Kr(VII), (VIII)Journal of Quantitative Spectroscopy and Radiative Transfer, 1977
- Beam-foil spectroscopy of bromine from 450 to 1000 ÅJournal of the Optical Society of America, 1977
- Beam-foil study of krypton between 400 and 800 ÅJournal of the Optical Society of America, 1976
- Relativistic Effects on Line Strengths for Transitions in the Hydrogenic lsoelectronic Sequence.Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1975
- Nuclear-Charge-Expansion Method for () TransitionsPhysical Review A, 1973
- Atomic Lifetimes of Low-Lying Levels in Multiply Charged Ions of Gallium, Germanium, Arsenic, and SeleniumPhysical Review A, 1973
- Self-Consistent Field Theory for Open Shells of Electronic SystemsReviews of Modern Physics, 1960
- Derivation of the Brueckner many-body theoryProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1957