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\footnotesize{Hfs spectra of $^{49}$Sc measured with the COLLAPS and CRIS methods on respectively ionic and atomic Sc beam. Data are fitted with a Voigt line profile using SATLAS~\cite{SATLAS}.}

\footnotesize{(a) Magnetic and (b) quadrupole moments of $^{41-49}$Sc compared to SM GXPF1A calculations~\cite{GXPF1A} using the effective $g$-factor ($g_s^{\rm eff}=0.9g_s^{\rm free}$) and effective charges ($e_{\rm \pi}=1.5e$, $e_{\rm \nu}=0.5e$) and to VS-IMSRG calculations (using free $g$-factors and bare nucleon charges) based on the NNLO$_\mathrm{sat}$~\cite{NNLOsat} and $\Delta$NNLO$_\mathrm{GO}$~\cite{NNLOgo} interactions. Dashed horizontal lines indicate the effective SP magnetic and quadrupole moments of one proton in the $\pi f_{7/2}$ orbit. (c) Magnetic and (d) quadrupole moments of $N=28$ isotones, compared to theoretical calculations. $^{51}$V, $^{53}$Mn and $^{55}$Co moments are taken from Refs.~\cite{u-51V,u-53Mn,u-55Co,Q-51V,Q-53Mn}. The red line in (d) is a linear fit of the data. Three sketches on the top with exaggerated deformation represent the shapes of $^{41,49}$Sc with a proton outside $^{40,48}$Ca and of $^{55}$Co with a hole inside $^{56}$Ni.}

\footnotesize{Nuclear moments of $N=28$ isotones calculated with VS-IMSRG and SM with protons constrained on different orbits, and with neutron excitation forbidden. For a better visualization, an intended offset $\delta \mu =0.48$ is added to the VS-IMSRG values.}