München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Structure and Dynamics of Nuclei IV

HK 22.6: Vortrag

Dienstag, 19. März 2019, 15:30–15:45, HS 16

Recent upgrades of the multiple-reflection time-of-flight isobar separator and mass spectrometer at TITAN, TRIUMF — •Gabriella Kripkó-Koncz for the TITAN collaboration — II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany

Measuring the atomic mass is critical to understand nuclear structure and astrophysics. Exotic nuclei can be produced with very high rates at the ISOL facility ISAC at TRIUMF (Vancouver, Canada). TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN) is a multiple ion-trap system for high-precision mass measurements and in-trap decay spectroscopy. A multiple-reflection time-of-flight isobar separator and mass spectrometer (MR-TOF-MS) has been integrated into the TITAN experiment. It is based on an established concept tested at the FRS Ion-Catcher at GSI. The ion of interest can be temporally separated from isobaric contaminations with mass-selective dynamic re-trapping. Furthermore, the device is well suited to perform high precision mass measurements, particularly for short-lived isotopes produced at low rate.

The improved capabilities of TITAN have been used in the first experiments to investigate the sub-shell closure of neutron-rich nuclides at N=32 and the r-process nucleo-synthesis for masses at A∼85. Besides these first results, several technical upgrades of the MR-TOF-MS have been made and will be presented.