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  Examining the N=28 shell closure through high-precision mass measurements of 46–48Ar

Mougeot, M., Atanasov, D., Barbieri, C., Blaum, K., Breitenfeld, M., de Roubin, A., et al. (2020). Examining the N=28 shell closure through high-precision mass measurements of 46–48Ar. Physical Review C, 102(1): 014301. doi:10.1103/PhysRevC.102.014301.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-A2C6-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-A2C7-2
Genre: Journal Article

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 Creators:
Mougeot, Maxime, Author
Atanasov, Dinko1, Author              
Barbieri, Carlo, Author
Blaum, Klaus1, Author              
Breitenfeld, Martin, Author
de Roubin, Antoine1, Author              
Duguet, Thomas, Author
George, Sebastian1, Author              
Herfurth, Frank, Author
Herlert, Alexander, Author
Holt, Jason D., Author
Karthein, Jonas1, Author              
Lunney, David, Author
Manea, Vladimir1, Author              
Navràtil, Petr, Author
Neidherr, Dennis, Author
Rosenbusch, Marco, Author
Schweikhard, Lutz, Author
Schwenk, Achim1, Author              
Somà, Vittorio, Author
Welker, Andree, AuthorWienholtz, Frank, AuthorWolf, Robert1, Author              Zuber, Kai, Author more..
Affiliations:
1Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              

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Free keywords: Nuclear Experiment, nucl-ex,Nuclear Theory, nucl-th
 MPINP: Präzisionsexperimente - Abteilung Blaum
 Abstract: The strength of the N=28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of 46–48Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the N=28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the SDPF-U phenomenological shell model interaction. Our results are also compared with ab initio calculations using the valence space in-medium similarity renormalization group and the self-consistent Green's function approaches. Both calculations provide a very good account of mass systematics at and around Z=18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that 46Ar is the transition between the closed-shell 48Ca and collective 44S.

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 Dates: 2020-07-01
 Publication Status: Published online
 Pages: 17 pages, 14 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2006.02712
DOI: 10.1103/PhysRevC.102.014301
 Degree: -

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Title: Physical Review C
  Other : Phys. Rev. C
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 102 (1) Sequence Number: 014301 Start / End Page: - Identifier: ISSN: 0556-2813
CoNE: https://pure.mpg.de/cone/journals/resource/954925225009