Reanalysis of the Hyperfine Structure of the4f66s2F7Multiplet inSm147,149, Including Measurements for theF67State

The hyperfine structure (hfs) of the $J=6\mathrm{}$ member of the $4f^{6}6s^2{}_{}{}^7{}_{}{}^{}F$ ground multiplet of ${}_{}{}^{147,149}{}_{}{}^{}\mathrm{Sm}$ has been measured by the atomic-beam magnetic-resonance technique, and that of the $J=1-5\mathrm{}$ states has been remeasured. The magnetic-dipole and electric-quadrupole hyperfine-interaction constants obtained, after correction for second-order hfs, are found to be consistent to a very high order with the three-parameter formulation of the Sandars-Beck effective-operator theory of hfs and with the Conway-Wybourne eigenvectors for the $J=1-6\mathrm{}{}_{}{}^7{}_{}{}^{}F$ states of Sm. The earlier apparent failure of these eigenvectors to be consistent with the magnetic dipole hfs of the ${}_{}{}^7{}_{}{}^{}F$ states with $J=1-5\mathrm{}$ is now resolved.