Exploring the onset of collectivity approaching <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>N</mi><mo>=</mo><mn>40</mn></mrow></math> with masses of manganese isotopes

C. Chambers; M. P. Reiter; A. T. Gallant; M. Yavor; C. Andreoiu; C. Babcock; J. Bergmann; T. Dickel; J. Dilling; E. Dunling; G. Gwinner; Z. Hockenbery; J. D. Holt; R. Klawitter; B. Kootte; Y. Lan; J. Lassen; E. Leistenschneider; R. Li; T. Miyagi; M. Mostamand; W. R. Plaß; C. Scheidenberger; R. Thompson; M. Vansteenkiste; M. E. Wieser; A. A. Kwiatkowski

doi:10.1103/jgxv-nf34

Exploring the onset of collectivity approaching $N = 40$ with masses of manganese isotopes

C. Chambers ^1,*, M. P. Reiter^2,1,3, A. T. Gallant⁴, M. Yavor^2,5,†, C. Andreoiu^6,7, C. Babcock¹, J. Bergmann², T. Dickel^2,8, J. Dilling^9,10,11 et al.

E. Dunling^1,12, G. Gwinner¹³, Z. Hockenbery^1,14, J. D. Holt^1,14, R. Klawitter^1,15, B. Kootte^1,13,16, Y. Lan^1,10, J. Lassen¹, E. Leistenschneider^1,10,17, R. Li^1,18, T. Miyagi^1,19, M. Mostamand^1,13,20, W. R. Plaß^2,8, C. Scheidenberger^2,21, R. Thompson²², M. Vansteenkiste^1,23,24, M. E. Wieser²², and A. A. Kwiatkowski^1,25

¹TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
²II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
³School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
⁴Physicial Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
⁵Institute for Analytical Instrumentation, Russian Academy of Sciences, 190103 St. Petersburg, Russia
⁶Department of Chemistry, Simon Fraser University, Burnaby, Canada, BC V5A 1S6
⁷Department of Physics, Simon Fraser University, Burnaby, Canada, BC V5A 1S6
⁸GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
⁹TRIUMF, 4004 Wesbrook Mall, Vancouver, Canada, BC V6T 2A3
¹⁰Department of Physics & Astronomy, University of British Columbia, Vancouver, Canada, BC V6T 1Z1
¹¹Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
¹²Department of Physics, University of York, York YO10 5DD, United Kingdom
¹³Department of Physics & Astronomy, University of Manitoba, Winnipeg, Canada, MB R3T 2N2
¹⁴Department of Physics, McGill University, Montreal, Canada, QC H3A 2T8
¹⁵Max-Planck-Institut für Kernphysik, Heidelberg D-69117, Germany
¹⁶Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
¹⁷Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
¹⁸Department of Physics, University of Windsor, Windsor, Canada, ON N9B 3P4
¹⁹Center for Computational Sciences, University of Tsukuba, Ibaraki-ken 305-8577, Japan
²⁰Paul Scherrer Institute PSI, 5232 Villigen PSI, Switzerland
²¹22 Helmholtz Research Academy Hesse for FAIR (HFHF), GSI Helmholtz Center for Heavy Ion Research, Campus Gießen, 35392 Gießen, Germany
²²Department of Physics and Astronomy, University of Calgary, Calgary, Canada, AB T2N 1N4
²³Department of Physics and Astronomy, University of Waterloo, Waterloo, Canada, ON N2L 3G1
²⁴Department of Physics, University of Toronto, Toronto, Canada, ON M5S 1A7
²⁵Department of Physics and Astronomy, University of Victoria, Victoria, Canada, BC V8P 5C2

^*Contact author: cchambers2@triumf.ca
^†Results presented here were obtained before 2022.

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Phys. Rev. C 112, 014332 – Published 31 July, 2025

DOI: https://doi.org/10.1103/jgxv-nf34

Abstract

Isotopes in the region of the nuclear chart below ${}^{68}{Ni}$ have been the subject of intense experimental and theoretical effort due to the potential onset of a new “island of inversion” when crossing the harmonic oscillator subshell closure at $N = 40$ . We have measured the masses of ${}^{64 - 68}{Mn}$ using TITAN's multiple-reflection time-of-flight mass spectrometer, resulting in the first precision mass measurements of ${}^{67}{Mn}$ and ${}^{68}{Mn}$ . These results are compared to ab initio calculations and modern shell model calculations and show an increase in collectivity approaching $N = 40$ .

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Exploring the onset of collectivity approaching $N = 40$ with masses of manganese isotopes

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Exploring the onset of collectivity approaching N=40 with masses of manganese isotopes

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Exploring the onset of collectivity approaching $N = 40$ with masses of manganese isotopes