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Journal Article

Probing the N = 32 Shell Closure below the Magic Proton Number Z = 20: Mass Measurements of the Exotic Isotopes 52,53K

MPS-Authors

Ascher,  Pauline
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Atanasov,  Dinko
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Borgmann,  Christopher
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Cakirli,  R. Burcu
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Department of Physics, University of Istanbul;

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George,  Sebastian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Kreim,  Susanne Waltraud
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
CERN;

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Wolf,  Robert
Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

External Ressource
Fulltext (public)

1506.00520
(Preprint), 166KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Rosenbusch, M., Ascher, P., Atanasov, D., Barbieri, C., Beck, D., Blaum, K., et al. (2015). Probing the N = 32 Shell Closure below the Magic Proton Number Z = 20: Mass Measurements of the Exotic Isotopes 52,53K. Physical Review Letters, 114(20): 202501. doi:10.1103/PhysRevLett.114.202501.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-A2B2-C
Abstract
The recently confirmed neutron-shell closure at N=32 has been investigated for the first time below the magic proton number Z=20 with mass measurements of the exotic isotopes K52,53, the latter being the shortest-lived nuclide investigated at the online mass spectrometer ISOLTRAP. The resulting two-neutron separation energies reveal a 3 MeV shell gap at N=32, slightly lower than for Ca52, highlighting the doubly magic nature of this nuclide. Skyrme-Hartree-Fock-Bogoliubov and ab initio Gorkov-Green function calculations are challenged by the new measurements but reproduce qualitatively the observed shell effect.