München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Structure and Dynamics of Nuclei I
HK 5.1: Group Report
Monday, March 18, 2019, 14:00–14:30, HS 14
The FRS Ion Catcher: Status, Results and Outlook — •Daler Amanbayev for the The FRS Ion Catcher collaboration — II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany
In the Fragment Separator (FRS) at GSI, exotic nuclei are produced by projectile fragmentation and fission at relativistic energies, separated in-flight and range-bunched. In the FRS Ion Catcher experiment (FRS-IC), nuclides are thermalized and stopped in a Cryogenic Stopping Cell (CSC), transported via versatile RFQ beamline to a Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) for high precision mass measurements or isobar and isomer separation.
Masses of more than 30 short-lived isotopes were measured with accuracies down to 6× 10−8, as well as 6 isomers with excitation energies down to 300 keV were observed.
A novel technique for measuring half-lives and decay branching ratios was developed. Feasibility measurements were carried out with 216Po alpha decay and 119nSb isomer-to-ground transition. These results, recent technical upgrades and approved experiments for FAIR Phase-0 will be presented.
The FRS-IC also serves as a prototype for the future Ion Catcher at the Low-Energy-Branch (LEB) of the Super-FRS at FAIR. Latest results of the next-generation CSC for the LEB with higher rate capability (107 ions per second), shorter extraction time (5 ms) and higher areal density (30 mg/cm2) will be discussed.