SMuK 2021 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Structure and Dynamics of Nuclei I

HK 15.1: Gruppenbericht

Dienstag, 31. August 2021, 16:30–17:00, H4

Recent results from the FRS Ion Catcher — •Gabriella Kripkó-Koncz for the FRS Ion Catcher collaboration — II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany

The atomic masses of exotic nuclei provide key information for the understanding of nuclear structure and astrophysics. The FRS Ion Catcher experiments at the FRagment Separator FRS at GSI enable high precision mass measurements or isobar and isomer separation with thermalized projectile and fission fragments by combining a Cryogenic Stopping Cell (CSC) and a Multiple-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF-MS). Incorporating several novel and unique concepts, the MR-TOF-MS enables the highest performance, such as a mass resolving powers at FWHM of up to 1,000,000 and relative mass accuracies down to 1.7·10⁻⁸.

Mass and half-life measurements of projectile fragments in the vicinity of ¹⁰⁰Sn were performed, including the first mass measurement of the ¹⁰¹In ground state and the discovery of a new isomeric state in ⁹⁷Ag. A novel technique for measuring half-lives and decay branching ratios was developed and demonstrated experimentally. These results including the most recent experiments, recent technical upgrades, and the status of the next-generation CSC for the Low-Energy-Branch of the Super-FRS at FAIR will be presented.