期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.192502
关键词
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资金
- Max-Planck Society
- German Federal Ministry for Education and Research [05P15RDCIA]
- Helmholtz International Center for FAIR (HIC for FAIR) within the LOEWE program by the State of Hesse
- Belgian IAP Project [P7/12]
- FWO-Vlaanderen
- KU Leuven [GOA 15/010]
- European Union seventh framework through ENSAR [262010]
- Science and Technology FacilitiesCouncil [ST/L005670/1, ST/L005794/1]
- Office of Science, U.S. Department of Energy [DE-SC0013365, DE-SC0018083]
- ERC [640465]
- EU Development Fund and Competitiveness Operational Program for the ELI-NP Project Phase II [1/07.07.2016, ID1334]
- STFC [ST/P004423/1, ST/L005794/1, ST/L005670/1] Funding Source: UKRI
The change in mean-square nuclear charge radii delta < r(2)> along the even-A tin isotopic chain Sn108-134 has been investigated by means of collinear laser spectroscopy at ISOLDE/CERN using the atomic transitions 5p(2) S-1(0) -> 5p6 s(1)P(1) and 5p(2) P-3(0) -> 5p6s P-3(1). With the determination of the charge radius of Sn-134 and corrected values for some of the neutron-rich isotopes, the evolution of the charge radii across the N = 82 shell closure is established. A clear kink at the doubly magic Sn-132 is revealed, similar to what has been observed at N = 82 in other isotopic chains with larger proton numbers, and at the N = 126 shell closure in doubly magic Pb-208. While most standard nuclear density functional calculations struggle with a consistent explanation of these discontinuities, we demonstrate that a recently developed Fayans energy density functional provides a coherent description of the kinks at both doubly magic nuclei, Sn-132 and Pb-208, without sacrificing the overall performance. A multiple correlation analysis leads to the conclusion that both kinks are related to pairing and surface effects.
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