Mass and lifetime measurements at the storage ring ESR

Abstract We present results from two methods of direct mass measurements of relativistic exotic nuclei stored in the storage ring ESR. Schottky Mass Spectrometry (SMS) with electron-cooled ions is well suited for long-lived nuclei ( T 1/2 ⩾10 s), and the Isochronous mass measurements (IMS) for hot fragments ( T 1/2 ⩾1 μs). In addition, SMS provides information on nuclear lifetime for bare and highly ionized atoms.