X-ray-induced quenching of the ${}^{229}$Th clock isomer in CaF${}_2$

Ming Guan, Michael Bartokos, Kjeld Beeks +27

Thorium-229 has the lowest nuclear-excited state (an isomer state) at approximately 8.356 eV, making it excitable with tabletop vacuum-ultraviolet lasers. Despite the recent succes…