Observation of Non-Exponential Orbital Electron Capture Decays of Hydrogen-Like ${}^{140}$Pr and ${}^{142}$Pm Ions

Yu. A. Litvinov, F. Bosch, N. Winckler +37

We report on time-modulated two-body weak decays observed in the orbital electron capture of hydrogen-like ${}^{140}$Pr${}^{59+}$ and ${}^{142}$Pm${}^{60+}$ ions coasting in an ion storage…