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Summit of the N=40 island of inversion: precision mass measurements and ab initio calculations of neutron-rich chromium isotopes

Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the Z=20 and 28 proton shell closures is particularly interesting due to the onset and evolution of nuclear deformation as nuclei beco...

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Main Authors: Silwal, Roshani (Author) , Andreoiu, C. (Author) , Ashrafkhani, B. (Author) , Bergmann, J. (Author) , Brunner, T. (Author) , Cardona, J. (Author) , Dietrich, Kilian (Author) , Dunling, E. (Author) , Gwinner, G. (Author) , Hockenbery, Z. (Author) , Holt, J. D. (Author) , Izzo, C. (Author) , Jacobs, A. (Author) , Javaji, A. (Author) , Kootte, B. (Author) , Lan, Y. (Author) , Lunney, D. (Author) , Lykiardopoulou, E. M. (Author) , Miyagi, T. (Author) , Mougeot, M. (Author) , Mukul, I. (Author) , Murböck, T. (Author) , Porter, W. S. (Author) , Reiter, M. (Author) , Ringuette, J. (Author) , Dilling, J. (Author) , Kwiatkowski, A. A. (Author)
Format: Article (Journal)
Language:English
Published: 12 July 2022
In: Physics letters
Year: 2022, Volume: 833, Pages: 1-7
ISSN:1873-2445
DOI:10.1016/j.physletb.2022.137288
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2022.137288
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269322004221
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Author Notes:R. Silwal, C. Andreoiu, B. Ashrafkhani, J. Bergmann, T. Brunner, J. Cardona, K. Dietrich, E. Dunling, G. Gwinner, Z. Hockenbery, J.D. Holt, C. Izzo, A. Jacobs, A. Javaji, B. Kootte, Y. Lan, D. Lunney, E.M. Lykiardopoulou, T. Miyagi, M. Mougeot, I. Mukul, T. Murböck, W.S. Porter, M. Reiter, J. Ringuette, J. Dilling, A.A. Kwiatkowski
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Summary:Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the Z=20 and 28 proton shell closures is particularly interesting due to the onset and evolution of nuclear deformation as nuclei become more neutron-rich. This provides a critical testing ground for emerging ab-initio nuclear structure models. Here, we present high-precision mass measurements of neutron-rich chromium isotopes using the sensitive electrostatic Multiple-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) facility. Our high-precision mass measurements of 59,61−63Cr confirm previous results, and the improved precision in measurements of 64−65Cr refine the mass surface beyond N=40. With the ab initio in-medium similarity renormalization group, we examine the trends in collectivity in chromium isotopes and give a complete picture of the N=40 island of inversion from calcium to nickel.
Item Description:Gesehen am 09.03.2023
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2022.137288

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