Abstract
The electronic structure and properties of 210Fr, 212Fr, 221Fr and 223Fr isotopes have been studied using the relativistic Fock space multireference coupled-cluster method. By employing this method, we have determined the magnetic hyperfine constants for the loweset multiplets of francium (Fr) isotopes with Dirac–Fock orbitals. We have provided the data for the ionization potentials and excitation energies for the Fr isotopes. The discrepancies between our calculated values and the corresponding measured experimental values are less than 2% (for energy). In addition, we also report the transition probabilities and oscillator strengths for the various allowed E1 transitions of Fr. The estimated properties are in very good agreement with the available experimental values.
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