Hyperfine structure of 2 P levels of heliumlike ions
نویسندگان
چکیده
A systematic calculation of the hyperfine structure of 2 P levels of heliumlike ions is presented. Reduced matrix elements of the magnetic-dipole hyperfine operator between substates of the 2 P states are evaluated using relativistic configuration-interaction wave functions that account for both Coulomb and Breit interactions. These matrix elements, together with the energy intervals DE105E(2 P1)2E(2 P0), DE205E(2 P2)2E(2 P0), and DEst5E(2 P1)2E(2 P0), are tabulated for ions with nuclear charges in the range Z52–100. For Z52, the matrix elements are in close agreement with precise nonrelativistic variational calculations, but as Z increases from 2 to 10, the present values deviate smoothly from the variational values owing to relativistic corrections. Applications are given to determine the hyperfine structure of He, Li, Be, and F. Hyperfine quenching rates of 2 P0 states are calculated using a radiation-damping formalism for all stable isotopes in the range Z56–92. Quenching rates of 2 P2 states are also calculated for selected ions. For Z59–29, the 2 P0 quenching rates are in good agreement with relativistic 1/Z calculations. For Z.40, the diagonal hyperfine matrix elements disagree in sign with previously published multiconfiguration Dirac-Fock values. In view of these differences, the present matrix elements are used to reevaluate the fine-structure intervals DE10 inferred from hyperfine quenching experiments for the ions Ni , Ag, and Gd. @S1050-2947~97!06604-3#
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