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Multiconfiguration calculations of electronic isotope shift factors in Al i

par Filippin, Livio ;Beerwerth, Randolf;Ekman, Jörgen;Fritzsche, Stephan;Godefroid, Michel ;Jönsson, Per
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 94, 6, 062508
Publication Publié, 2016-12

Article révisé par les pairs

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Résumé :

The present work reports results from systematic multiconfiguration Dirac-Hartree-Fock calculations of electronic isotope shift factors for a set of transitions between low-lying levels of neutral aluminium. These electronic quantities together with observed isotope shifts between different pairs of isotopes provide the changes in mean-square charge radii of the atomic nuclei. Two computational approaches are adopted for the estimation of the mass- and field-shift factors. Within these approaches, different models for electron correlation are explored in a systematic way to determine a reliable computational strategy and to estimate theoretical error bars of the isotope shift factors.