Pushing the Limits of Ab-Initio Theory through Precision Mass Measurements of Neutron Rich Potassium at TITAN

10 Jun 2024, 12:10
20m
A102 (Agora, University of Jyväskylä, Finland)

A102

Agora, University of Jyväskylä, Finland

Agora, Mattilanniemi 2, 40100 Jyväskylä, Finland
Oral Presentation Plenary

Speaker

Coulter Walls (University of Manitoba)

Description

TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) is a set of connected ion traps for rare isotope science. TITAN operates a Multi-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF-MS) primarily for nuclear mass measurements and isomerically selective ion beam cleaning. TITAN's MR-TOF-MS has demonstrated excellent dynamic range ($\sim10^8$), high-precision ($\frac{\delta m}{m} \sim 10^{-7}$) and high-speed ($\sim 5$ ms) mass measurements, allowing for the study of very exotic isotopes. Additionally, TITAN has developed new techniques enabling the measurement of half-lives using the MR-TOF-MS. This has allowed for half-life measurements of isotopes between $\sim$5 ms and $\sim$5 min. Concurrent decay detection with mass measurements as been developed as a routine tool for supplementary identification of rare isotope species at TITAN. TITAN's MR-TOF-MS's unique ability to self-purify ion beam through mass selective re-trapping has made this a particularly powerful technique for science at TITAN. Applications of these new techniques for the study of nuclear structure and nucleosynthesis will also be discussed.

TITAN has recently used the MR-TOF-MS to make a set of mass measurements clarifying the nuclear structure near N=34 in potassium. Experimental ground state masses are compared to new state of the art ab-initio calculations. This is used to benchmark the accuracy of novel nuclear interaction models near the neutron dripline.

Authors

Coulter Walls (University of Manitoba) Christopher Chambers (TRIUMF) Ali Mollaebrahimi (University of Giessen and TRIUMF) Moritz Pascal Reiter (University of Edinburgh) Mr Pavithra Weligampola (University of Manitoba) Prof. Gerald Gwinner (University of Manitoba) Ania Kwiatkowski (TRIUMF)

Presentation materials

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