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; 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

doi:10.1103/PhysRevLett.127.112501

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, Jens Dilling, Jerzy Dudek, Eleanor Dunling, Jake Flowerdew, Abdelghafar Gaamouci, Leigh Graham, Gerald Gwinner, Andrew JacobsRenee 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

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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 Yb150,153 and the excitation energy of Ybm151 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 h11/2-excited isomeric states of the N=81 isotones are unraveled using state-of-the-art mean field calculations.

Original language	English
Article number	112501
Journal	Physical Review Letters
Volume	127
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.127.112501
State	Published - Sep 10 2021

Funding

We would like to thank J. Lassen and the TRILIS ion source group for the excellent beam conditions. This work was supported by the German Research Foundation (DFG), Grant No. SCHE 1969/2-1; by the German Federal Ministry for Education and Research (BMBF), Grants No. 05P16RGFN1 and No. 05P19RGFN1; by the Hessian Ministry for Science and Art through the LOEWE Center HIC for FAIR; by the JLU and GSI Helmholtzzentrum f\u00FCr Schwerionenforschung under the JLU-GSI strategic Helmholtz partnership agreement; by the Polish National Science Centre under Contract No. 2016/21/B/ST2/01227; and by the UKRI Science and Technology Facilities Council (STFC), Grant No. ST/P004008/1. Support from the National Natural Science Foundation of China, Grant No. 11975209, and the Physics Research and Development Program of Zhengzhou University, Grant No. 32410017, are acknowledged. TITAN is funded by the Natural Sciences and Engineering Research Council (NSERC) of Canada and through TRIUMF by the National Research Council (NRC) of Canada. N.\u2009M. acknowledges the support by the FAIR Phase-0 project and by Bulgarian NSF Contract No. KP-06-N48/1. E.\u2009D. acknowledges the support by the Canada-UK Foundation.

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10.1103/PhysRevLett.127.112501

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Beck, S., Kootte, B., Dedes, I., Dickel, T., Kwiatkowski, A. A., Lykiardopoulou, E. M., Plaß, W. R., Reiter, M. P., 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

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

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 Yb150,153 and the excitation energy of Ybm151 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 h11/2-excited isomeric states of the N=81 isotones are unraveled using state-of-the-art mean field calculations.",

author = "S{\"o}nke Beck and Brian Kootte and Irene Dedes and Timo Dickel and Kwiatkowski, {A. A.} and Lykiardopoulou, {Eleni Marina} and Pla{\ss}, {Wolfgang R.} and Reiter, {Moritz P.} and Corina Andreoiu and Julian Bergmann and Thomas Brunner and Dominique Curien and Jens Dilling and Jerzy Dudek and Eleanor Dunling and Jake Flowerdew and Abdelghafar Gaamouci and Leigh Graham and Gerald Gwinner and Andrew Jacobs and Renee Klawitter and Yang Lan and Erich Leistenschneider and Nikolay Minkov and Victor Monier and Ish Mukul and Paul, {Stefan F.} and Christoph Scheidenberger and Thompson, {Robert I.} and Tracy, {James L.} and Michael Vansteenkiste and Wang, {Hua Lei} and Wieser, {Michael E.} and Christian Will and Jie Yang",

note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

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Beck, S, Kootte, B, Dedes, I, Dickel, T, Kwiatkowski, AA, Lykiardopoulou, EM, Plaß, WR, Reiter, MP, Andreoiu, C, Bergmann, J, Brunner, T, Curien, D, Dilling, J, Dudek, J, Dunling, E, Flowerdew, J, Gaamouci, A, Graham, L, Gwinner, G, Jacobs, A, Klawitter, R, Lan, Y, Leistenschneider, E, Minkov, N, Monier, V, Mukul, I, Paul, SF, Scheidenberger, C, Thompson, RI, Tracy, JL, Vansteenkiste, M, Wang, HL, Wieser, ME, Will, C & 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, vol. 127, no. 11, 112501. https://doi.org/10.1103/PhysRevLett.127.112501

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AU - Beck, Sönke

AU - Kootte, Brian

AU - Dedes, Irene

AU - Dickel, Timo

AU - Kwiatkowski, A. A.

AU - Lykiardopoulou, Eleni Marina

AU - Plaß, Wolfgang R.

AU - Reiter, Moritz P.

AU - Andreoiu, Corina

AU - Bergmann, Julian

AU - Brunner, Thomas

AU - Curien, Dominique

AU - Dilling, Jens

AU - Dudek, Jerzy

AU - Dunling, Eleanor

AU - Flowerdew, Jake

AU - Gaamouci, Abdelghafar

AU - Graham, Leigh

AU - Gwinner, Gerald

AU - Jacobs, Andrew

AU - Klawitter, Renee

AU - Lan, Yang

AU - Leistenschneider, Erich

AU - Minkov, Nikolay

AU - Monier, Victor

AU - Mukul, Ish

AU - Paul, Stefan F.

AU - Scheidenberger, Christoph

AU - Thompson, Robert I.

AU - Tracy, James L.

AU - Vansteenkiste, Michael

AU - Wang, Hua Lei

AU - Wieser, Michael E.

AU - Will, Christian

AU - Yang, Jie

N1 - Publisher Copyright: © 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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AB - 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 Yb150,153 and the excitation energy of Ybm151 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 h11/2-excited isomeric states of the N=81 isotones are unraveled using state-of-the-art mean field calculations.

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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

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