Lifetime measurements of nuclei in few-electron ions

Abstract

In this review lifetime measurements of ions with at most two electrons are summarized. Such highly ionized systems have been studied - until now - only in the Experimental Storage Ring of the GSI in Darmstadt. Emphasis is put on decays via the weak interaction. The first observations of beta-decay into bound atomic states are described as well as its time mirrored counterpart, the electron-capture decay. In the latter case the decays of hydrogen- and helium-like ions are compared with a surprising result. Further on, the observation of sinusoidal modulations of the decay rate in two-body decays is summarized. As a possible cause an interference due to the emission of neutrinos with different rest mass is discussed.

Proceedings of the 9th International Conference on Nuclear Physics at Storage Rings STORI'14

References in corpus (7)

• Big-Bang Nucleosynthesis
• Observation of Non-Exponential Orbital Electron Capture Decays of Hydrogen-Like ${}^{140}$Pr and ${}^{142}$Pm Ions
• Measurement of the ${\beta }^{+}$ and orbital electron-capture decay rates in fully-ionized, hydrogen-like, and helium-like ${}^{140}$Pr ions
• High-resolution measurement of the time-modulated orbital electron capture and of the ${\beta }^{+}$ decay of hydrogen-like ${}^{142}$Pm${}^{60+}$ ions
• Weak decays of H-like 140Pr58+ and He-like 140Pr57+ ions
• On the time modulation of the K-shell electron capture decay rates of H-like heavy ions at GSI experiments
• Search for Oscillation of the Electron-Capture Decay Probability of ${}^{142}$Pm