The effect of realistic nuclear charge distributions on atomic levels and transitions
Abstract: Analogue atomic spectral lines from different isotopes display a small shift in energy, commonly referred as the frequency isotope shift. One of the components of the isotope shift is the field shift, which depends on the extent and the shape of the nuclear charge density distribution. In this work, we investigate how sensitive field shifts are with respect to variations in the nuclear size and shapes. It is found that realistic shapes of nuclei can have a considerable effect in the prediction of the field shifts. Using a novel approach, we demonstrate the possibility to extract new information concerning the nuclear charge densities from the observed field shifts.
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