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Relativistic multiconfiguration Dirac-Hartree-Fock (MCDHF) calculations withconfiguration interaction (CI) are carried out for the $^{1}S_{0}$ and$^{3}P_{0,1}^o$ states in neutral ytterbium by use of the available GRASP2018package. From the resultant atomic state functions and the RIS4 extension, weevaluate the mass and field shift parameters for the $^{1}S_{0}-\,^{3}P_{0}^o$(clock) and $^{1}S_{0}-\,^{3}P_{1}^o$ (intercombination) lines. We presentimproved estimates of the nuclear charge parameters, $\lambda^{A,A'}$, anddifferences in mean-square charge radii, $\delta\langle r^2\rangle^{A,A'}$, andexamine the second-order hyperfine interaction for the $^{3}P_{0,1}^o$ states.Isotope shifts for the clock transition have been estimated by three largelyindependent means from which we predict the unknown clock line frequencies inbosonic Yb isotopes. Knowledge of these line frequencies has implications forKing plot nonlinearity tests and the search for beyond Standard-Modelsignatures.

Isotope shifts for ${}^1S_0-{}^3P_{0,1}^o$ Yb lines from multi-configuration Dirac-Hartree-Fock calculations