Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 2: Structure and Dynamics of Nuclei II

HK 2.1: Group Report

Monday, March 10, 2025, 15:00–15:30, HS 3 Physik

Latest Results from TITAN's Multiple-Reflection Time-Of-Flight Mass Spectrometer — •Ali Mollaebrahimi for the TITAN collaboration — Justus-Liebig-Universität Gießen

TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) specializes in high-precision measurements and isobaric separation of exotic nuclei using advanced electromagnetic traps. These precise mass measurements are crucial for investigating nuclear structure and studying astrophysical processes involving isotopes far from the valley of stability.

TITAN's Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) enables the study of short-lived and rare nuclei through its fast measurement cycles (on the order of milliseconds) and exceptional sensitivity. This presentation highlights recent developments and experimental results achieved with the MR-TOF-MS. The nuclear physics studies include the first-time mass measurement of neutron-rich 136-138Sn, providing insights into nuclear structure beyond the neutron shell closure at N=82, and exploring their astrophysical implications for the rapid neutron capture process (r-process). Additionally, high-precision mass measurements of 31-33Na and 31-35Mg for refining the topology of the N=20 island of inversions. Finally, measurements of neutron-deficient 74-76Sr isotopes along N=Z line for investigation of A = 74, T = 1 isospin triplet and the impact of the new mass data on the reaction flow of the rapid proton capture process (rp-process) in type I x-ray bursts.

Keywords: Mass spectrometry; Nuclear structure; Nuclear Astrophysics; MR-TOF-MS; Exotic nuclei