F. Nolden

Schottky mass measurements of stored and cooled neutron-deficient projectile fragments in the element range of 57≤Z≤84

Abstract A novel method for direct, high precision mass measurements of relativistic exotic nuclei has been successfully applied in the storage ring ESR at GSI. The nuclei of interest were produced by projectile fragmentation of 930 MeV / u bismuth ions, separated in-flight by the fragment separator FRS, stored and cooled in the ESR. The mass values have been deduced from the revolution frequencies of the coasting cooled ions. We have measured 104 new mass values with a precision of about 100 keV and a resolving power of 3.5×10 5 for the neutron-deficient isotopes of the elements 57≤Z≤84 . This paper presents the experimental method, the mass evaluation and a table of the experimental mass values.

Observation of non-exponential orbital electron capture decays of hydrogen-like 140Pr and 142Pm ions

Abstract 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 ring. Using non-destructive single ion, time-resolved Schottky mass spectrometry we found that the expected exponential decay is modulated in time with a modulation period of about 7 seconds for both systems. Tentatively this observation is attributed to the coherent superposition of finite mass eigenstates of the electron neutrinos from the weak decay into a two-body final state.

Observation of Bound-State beta- Decay of Fully Ionized Re-187: Re-187- Os-187 Cosmochronometry

We observed the bound-state

Measurement of the {beta}{sup +} and Orbital Electron-Capture Decay Rates in Fully Ionized, Hydrogenlike, and Heliumlike {sup 140}Pr Ions

{\ensuremath{\beta}}^{\ensuremath{-}}

Schottky mass spectrometry at the heavy ion storage ring ESR

decay of fully ionized

Measurement of the ground-state lambshift of hydrogenlike uranium at the electron cooler of the ESR

{}^{187}

High-resolution measurement of the time-modulated orbital electron capture and of the β+ decay of hydrogen-like 142Pm60+ ions

Re nuclei circulating in a storage ring. With two independent methods the time dependent growth of hydrogenlike

New evidence for one-dimensional ordering in fast heavy ion beams

{}^{187}

Observation of Bound-State β − Decay of Fully Ionized 187 Re: 187 Re − 187 Os Cosmochronometry

Os ions has been measured and a half-life of

Schottky mass spectrometry at the experimental storage ring ESR

32.9\ifmmode\pm\else\textpm\fi{}2.0\mathrm{yr}