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  • 1
    ISSN: 1434-6079
    Keywords: PACS. 32.70.Cs Oscillator strengths, lifetime, transition moments - 32.70.Fw Absolute and relative intensities - 31.25.-v Electron correlation calculations for atoms and molecules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Structure and QED effects for and levels are calculated for lithiumlike U89+ trough neonlike U82+, lithiumlike Th87+ trough neonlike Th80+ and lithiumlike Bi80+ trough neonlike Bi73+. The results of the first two sets are compared with recent measurements of the transition energy in 3 to 10-electron ions. Good agreement with experiment is found for most of the observed lines. Forty-one possible transitions are calculated for each ion in the eight ionization states, in the experimental energy range. Twenty-eight of these transitions have not been observed, nor calculated previously. We also calculate transition rates, branching ratios, excitation and ionization cross sections and confirm that the thirteen experimental o bserved transitions correspond to the ones with highest relative intensities. However, we find nineteen more transitions that could be measured in a more sensitive experiment.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6079
    Keywords: PACS. 31.10.+z Theory of electronic structure, electronic transitions, and chemical binding - 31.15.Ar Ab initio calculations - 31.30.Jv Relativistic and quantum elecrodynamic effects in atoms and molecules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We report on a calculation of K, L and M inner-shell ionization energy in atoms with atomic numbers in the range . Many-body effects are evaluated for all n =1, 2, and 3 hole states. Those include correlation and effects due to the auto-ionizing nature of the hole states (Auger shift). For high Z we add recent corrected nuclear polarization, and several second-order vacuum polarization corrections. K and L ionization energies are compared with experimental X-ray absorption edges measurements. Excellent agreement with rare gazes and metal vapor measurements is found. We also compare our calculations with X-ray transition energies for all K and L lines that involve K, L and M holes. Finally we use K X-ray lines to deduce an hydrogenlike 1 s Lamb shift for several heavy elements, with far better accuracy than has been obtained by direct measurements of hydrogenlike ions.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 8 (2000), S. 59-73 
    ISSN: 1434-6079
    Keywords: PACS. 32.10.Fn Fine and hyperfine structure [:AND:] 31.30.Jv Relativistic and quantum electrodynamic effects in atoms and molecules - 31.25.Eb Electron-correlation calculations for atoms and ions: ground state
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The hyperfine splitting of the ground state of three-electron ions is studied in detail with the help of the multi-configuration Dirac-Fock method. We study the role of the magnetic electron-electron interaction and of the negative energy continuum. An all-order evaluation of some vacuum polarization corrections is performed. The Bohr-Weisskopf effect is evaluated in a simple model.
    Type of Medium: Electronic Resource
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