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High-precision mass measurement of neutron-rich 96Kr

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Abstract

While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton (Z = 36) is still a subject of controversy. Here, we present a high-precision mass measurement of the neutron-rich nuclide 96Kr, as measured by the Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN). A statistical method, based on a hyper-exponentially modified Gaussian, has been employed to model the data. As such, the uncertainty introduced by overlapping peaks from beam contaminants was reduced and the mass excess of 96Kr determined to be -53097(57)keV. The capability of the method has been confirmed with measurements of the stable isotopic pair 40Ar/40Ca, in which a relative accuracy Δm/m of 3.5 ⋅ 10− 8 and a mass resolving power of more than 400000 were achieved.

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Acknowledgements

This work was supported by BMBF (grants 05P15RGFN1 and 05P12RGFN8), and by the JLU and GSI under the JLU-GSI strategic Helmholtz partnership agreement, by the Canada-UK foundation, and by France’s IN2P3 and the Programme Internationale de Coopération Scientifique “PACIFIC”. E.L. acknowledges support from Brazil’s Conselho Nacional de Desenvolvimento Cientifico e Tecnolgico (CNPq) under Science Without Borders’ grant no. 249121/2013-1.

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Authors and Affiliations

  1. TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada

    Matthew B. Smith, Tobias Murböck, Eleanor Dunling, Andrew Jacobs, Brian Kootte, Yang Lan, Erich Leistenschneider, Eleni Marina Lykiardopoulou, Ish Mukul, Stefan F. Paul, Moritz P. Reiter, Jens Dilling & Anna A. Kwiatkowski

  2. Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom

    Eleanor Dunling

  3. Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada

    Andrew Jacobs, Yang Lan, Erich Leistenschneider, Eleni Marina Lykiardopoulou & Jens Dilling

  4. Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada

    Brian Kootte

  5. CSNSM-IN2P3, Université de Paris Sud, Orsay, France

    David Lunney

  6. Ruprecht-Karls-Universität Heidelberg, D-69117, Heidelberg, Germany

    Stefan F. Paul

  7. II. Physikalisches Institut, Justus-Liebig-Universität, 35392, Gießen, Germany

    Moritz P. Reiter & Christian Will

  8. School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3FD, Scotland

    Moritz P. Reiter

  9. University of Victoria, Victoria, British Columbia, V8P 5C2, Canada

    Anna A. Kwiatkowski

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  1. Matthew B. Smith
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Correspondence to Anna A. Kwiatkowski.

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This article is part of the Topical Collection on Proceedings of PLATAN 2019, 1st International Conference, Merger of the Poznan Meeting on Lasers and Trapping Devices in Atomic Nuclei Research and the International Conference on Laser Probing, Mainz, Germany 19-24 May 2019

Edited by Krassimira Marinova, Michael Block, Klaus D.A. Wendt and Magdalena Kowalska

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Smith, M.B., Murböck, T., Dunling, E. et al. High-precision mass measurement of neutron-rich 96Kr. Hyperfine Interact 241, 59 (2020). https://doi.org/10.1007/s10751-020-01722-2

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