A solid-state nuclear clock based on VUV absorption spectroscopy of ${}^{229}$Th

Pengfei Wang, Xu-Fei Yin, Hanlin Wang +21

We demonstrate sustained operation of a solid-state thorium-229 nuclear clock using continuous-wave absorption at 148.4 nm. In a ${}^{229}\mathrm{Th}:{\mathrm{CaF}}_2$ crystal, we reso…