Can Hyperfine Excitation explain the Observed Oscillation-Puzzle of Nuclear Orbital Electron Capture of Hydrogen-like Ions?

Nicolas Winckler, Katarzyna Siegien-Iwaniuk, Fritz Bosch +3

Modulated in time orbital electron capture (EC) decays have been observed recently in stored H-like ${}^{140}$Pr${}^{58+}$ and ${}^{142}$Pm${}^{60+}$ ions. Although, the experimental resul…