Sc*

Collinear laser spectroscopy was performed at the BECOLA facility at NSCL/FRIB/MSU on the 3d4s ³D₂↔3d4f ³F₃ transition in ⁴⁰Sc ions and the hyperfine spectrum was observed. The ground state nuclear magnetic moments was newly determined for ⁴⁰Sc from the hyperfine coupling constants extracted from the obtained hyperfine spectrum. The ⁴⁰Sc magnetic moment is particularly interesting for studies of nuclear structure as an odd-odd nucleus at the proton drip line in the vicinity of doubly magic ⁴⁰Ca. The experimental detail and comparison with the additive rule of magnetic moment will be discussed.