$J=0$ metastable state of ${\mathrm{Th}}^{2+}$ for a hyperfine-free nuclear clock

S. Sagar Maurya, V. Lal, J. Tiedau +2

We present measurements on a metastable state in ${\mathrm{Th}}^{2+}$ with the electronic configuration $6d^2{}^3{P}_0(5090\mathrm{c}{\mathrm{m}}^{-1})$. This is motivated by the prospect o…