Abstract
The nuclear quadrupole moments of $^{33}\mathrm{S}$ and $^{35}\mathrm{S}$ are studied using numerical multiconfigurational Hartree-Fock (MCHF) calculations on ${\mathrm{S}}^{\mathrm{\ensuremath{-}}}$${(}^{2}$${\mathit{P}}_{3/2}$). A newly developed finite-element MCHF program allowing very large configuration-interaction expansions is used. The 3${\mathit{p}}^{5}$ valence correlation decreases the electric field gradient with about 12%, but core-valence polarization increases the electric field gradient with about 14% of the Hartree-Fock value. The final values for the nuclear quadrupole moments of $^{33}\mathrm{S}$ and $^{35}\mathrm{S}$ become -0.0678(13) and 0.0471(9) b, respectively.
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