Laser spectroscopic characterization of the nuclear clock isomer ${}^{229m}$Th

Johannes Thielking, Maxim V. Okhapkin, Przemyslaw Glowacki +6

The isotope ${}^{229}$Th is the only nucleus known to possess an excited state ${}^{229m}$Th in the energy range of a few electron volts, a transition energy typical for electrons in t…