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

Rosenbusch, M; Ascher, P; Atanasov, D; Barbieri, C; Beck, D; Blaum, K; Borgmann, Ch; Breitenfeldt, M; Cakirli, R B; Cipollone, A; George, S; Herfurth, F; Kowalska, M; Kreim, S; Lunney, D; Manea, V; Navrátil, P; Neidherr, D; Schweikhard, L; Somà, V; Stanja, J; Wienholtz, F; Wolf, R N; Zuber, K

Rosenbusch, M; Ascher, P; Atanasov, D; Barbieri, C; Beck, D; Blaum, K; Borgmann, Ch; Breitenfeldt, M; Cakirli, R B; Cipollone, A; George, S; Herfurth, F; Kowalska, M; Kreim, S; Lunney, D; Manea, V; Navrátil, P; Neidherr, D; Schweikhard, L; Somà, V; Stanja, J; Wienholtz, F; Wolf, R N; Zuber, K.

Afiliación

Rosenbusch M; Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany.
Ascher P; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Atanasov D; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Barbieri C; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
Beck D; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany.
Blaum K; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Borgmann Ch; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Breitenfeldt M; Instituut voor Kern- en Stralingsfysica, KU Leuven, Celestijnenlaan 200d, B-3001 Heverlee, Belgium.
Cakirli RB; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Cipollone A; Department of Physics, University of Istanbul, 34134 Istanbul, Turkey.
George S; Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
Herfurth F; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Kowalska M; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany.
Kreim S; CERN, 1211 Geneva 23, Switzerland.
Lunney D; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
Manea V; CERN, 1211 Geneva 23, Switzerland.
Navrátil P; CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France.
Neidherr D; CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France.
Schweikhard L; TRIUMF, 4004 Westbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
Somà V; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany.
Stanja J; Institut für Physik, Ernst-Moritz-Arndt Universität Greifswald, 17487 Greifswald, Germany.
Wienholtz F; CEA-Saclay, IRFU/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France.
Wolf RN; Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
Zuber K; ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.

Phys Rev Lett ; 114(20): 202501, 2015 May 22.

Article en En | MEDLINE | ID: mdl-26047224

RESUMEN

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 (52,53)K, 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 52Ca, 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.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2015 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Estados Unidos

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