par Carette, Thomas ;Godefroid, Michel
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 89, 5, 052513
Publication Publié, 2014
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 89, 5, 052513
Publication Publié, 2014
Article révisé par les pairs
Résumé : | The isotope effects in Si- bound levels are studied using the multiconfiguration Hartree-Fock ab initio approach. Large-scale calculations are carried out for the 3p34So, 2Do, and 2Po multiplets of Si- and the 3p23P multiplet of Si. We predict an anomalous isotope shift on the electron affinity, dominated by the specific mass shift, with a value of -0.66(6) m-1 for the 30-28 isotope pair. We also report hyperfine-structure parameters for the studied multiplets. We provide the values of level electric-field gradients at the nucleus that could be of interest in a study of the metastable silicon isotopes. Relativistic corrections are estimated using nonrelativistic orbitals in the Breit-Pauli and fully relativistic frameworks. © 2014 American Physical Society. |