期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.202501
关键词
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资金
- German Federal Ministry for Education and Research (BMBF) [05P12HGCI1, 05P12HGFNE, 05P09ODCIA]
- Max-Planck Society
- European Union seventh framework through ENSAR [262010]
- French IN2P3
- ISOLDE Collaboration
- DFG [SFB 634]
- Helmholtz Alliance Program [HA216/EMMI]
- United Kingdom Science and Technology Facilities Council (STFC) [ST/L005743/1, ST/L005816/1]
- Natural Sciences and Engineering Research Council of Canada (NSERC) [401945-2011]
- GENCI-CCRT [2014-050707, 2015-057392]
- DiRAC Data Analytic system at the University of Cambridge (BIS National E-infrastructure capital Contract) [ST/K001590/1]
- STFC [ST/H008861/1, ST/H00887X/1, ST/K00333X/1]
- Robert-Bosch Foundation
- Max-Planck Partner group
- STFC [ST/H00887X/1, ST/L005743/1, ST/K00333X/1, ST/M007073/1, ST/H008861/1, ST/K001590/1, ST/J000051/1, ST/L005816/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L005743/1, ST/K00333X/1, ST/K001590/1, ST/H008861/1, ST/L005816/1, ST/M007073/1, ST/J000051/1, ST/H00887X/1] Funding Source: researchfish
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 K-52,K-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 Ca-52, 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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