Calculation of isotope shifts for cesium and francium

Abstract

We perform ab initio calculations of isotope shifts for isotopes of cesium (from A=123 to A=137) and francium (from A=207 to A=228). These calculations start from the relativistic Hartree-Fock method and make use of several techniques to include correlations. The field (volume) isotope shift is calculated by means of an all-order correlation potential method and within the singles-doubles partial triples linearized coupled-cluster approach. Many-body perturbation theory in two different formulations is used to calculate the specific mass shift. We discuss the strong points and shortcomings of the different approaches and implications for parity nonconservation in atoms. Changes in nuclear charge radii are found by comparing the present calculations with experiment.

8 pages, 10 tables, no figures, submitted to Phys. Rev. A

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• Violations of fundamental symmetries in atoms and tests of unification theories of elementary particles
• Further evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra
• Isotope shift calculations for atoms with one valence electron
• Does the fine structure constant vary? A detailed investigation into systematic effects
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