Journal article

Publication year: 2021

Journal: Physical Review Letters

Volume number: 127

Issue number: 11

ISSN: 0031-9007

eISSN: 1079-7114

Open access status: Hybrid

DOI Link: https://doi.org/10.1103/PhysRevLett.127.112501

Publisher: American Physical Society

Abstract: 
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 Yb-150,Yb- 153 and the excitation energy of Yb-151(m) were measured for the first time. As a result, the persistence of the N = 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 = 81 isotones are unraveled using state-of-the-art mean field calculations.

Harvard Citation style: Beck, S., Kootte, B., Dedes, I., Dickel, T., Kwiatkowski, A., Lykiardopoulou, E., et al. (2021) 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), Article 112501. https://doi.org/10.1103/PhysRevLett.127.112501

APA Citation style: Beck, S., Kootte, B., Dedes, I., Dickel, T., Kwiatkowski, A., Lykiardopoulou, E., Plass, W., Reiter, M., Andreoiu, C., Bergmann, J., Brunner, T., Curien, D., Dilling, J., Dudek, J., Dunling, E., Flowerdew, J., Gaamouci, A., Graham, L., Gwinner, G., ...Yang, J. (2021). 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), Article 112501. https://doi.org/10.1103/PhysRevLett.127.112501