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Mass Measurements of Neutron-Deficient Yb Isotopes and Nuclear Structure at the Extreme Proton-Rich Side of the N = 82 Shell

Sönke Beck, Brian Kootte, Irene Dedes, Timo Dickel, A. A. Kwiatkowski, Eleni Marina Lykiardopoulou, Wolfgang R. Plaß, Moritz P. Reiter, Corina Andreoiu, Julian Bergmann, Thomas Brunner, Dominique Curien (+23 others)
2021 Physical review letters 127(11)  

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High-accuracy mass measurements of neutron-deficient Yb isotopes have been performed at TRIUMF using TITAN's multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS). For the first time, an MR-TOF-MS was used on line simultaneously as an isobar separator and as a mass spectrometer, extending the measurements to two isotopes further away from stability than otherwise possible. The ground state masses of 150;153 Yb and the excitation energy of 151 Yb m were measured for the first time. As
more » ... a result, the persistence of the N ¼ 82 shell with almost unmodified shell gap energies is established up to the proton drip line. Furthermore, the puzzling systematics of the h 11=2 -excited isomeric states of the N ¼ 81 isotones are unraveled using state-of-the-art mean field calculations.
doi:10.15120/gsi-2022-00123 fatcat:2xfaijrzxndqjkpbcyogv66ijq
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Sönke Beck, Brian Kootte, Irene Dedes, Timo Dickel, A. A. Kwiatkowski, Eleni Marina Lykiardopoulou, Wolfgang R. Plaß, Moritz P. Reiter, Corina Andreoiu, Julian Bergmann, Thomas Brunner, Dominique Curien, Jens Dilling, Jerzy Dudek, Eleanor Dunling, Jake Flowerdew, Abdelghafar Gaamouci, Leigh Graham, Gerald Gwinner, Andrew Jacobs, Renee Klawitter, Yang Lan, Erich Leistenschneider, Nikolay Minkov, Victor Monier, Ish Mukul, Stefan F. Paul, Christoph Scheidenberger, Robert I. Thompson, James L. Tracy, Michael Vansteenkiste, Hua-Lei Wang, Michael E. Wieser, Christian Will, Jie Yang. "Mass Measurements of Neutron-Deficient Yb Isotopes and Nuclear Structure at the Extreme Proton-Rich Side of the N = 82 Shell." Physical review letters 127(11) (2021) 112501 (2021). doi:10.1103/PhysRevLett.127.112501