F. Bosch

TL;DR: Spectra of positrons emitted in heavy-ion-atom collisions close to the Coulomb barrier were measured in this article, and the data exhibit broad energy distributions according to expectations for induced positron creation by the strong time-changing Coulomb field.

TL;DR: Bound-state {beta}{sup {minus}} decay was observed for the fist time by storing bare bare {sub 66}{sup 163}Dy{sup 66+} ions in a heavy-ion storage ring and bounds for both the value of neutral {sub 67}Ho and for the electron-neutrino mass were set.

TL;DR: The present result is about 3 times more precise than the most accurate value available up to now and provides the most stringent test of bound-state quantum electrodynamics for one-electron systems in the strong-field regime.

TL;DR: In this paper, the decay of fully ionized Re nuclei circulating in a storage ring has been observed and a half-life of $32.03$ has been calculated, to be compared with 42 Gyr for neutral Re atoms.

TL;DR: In this paper, an isochronous operational mode of the ESR has been investigated to make mass measurements of nuclides with lifetimes down to a few ls feasible.