Details

Autor(en) / Beteiligte

• Gorges, C
• Rodríguez, L V
• Balabanski, D L
• Bissell, M L
• Blaum, K
• Cheal, B
• Garcia Ruiz, R F
• Georgiev, G
• Gins, W
• Heylen, H
• Kanellakopoulos, A
• Kaufmann, S
• Kowalska, M
• Lagaki, V
• Lechner, S
• Maaß, B
• Malbrunot-Ettenauer, S
• Nazarewicz, W
• Neugart, R
• Neyens, G
• Nörtershäuser, W
• Reinhard, P-G
• Sailer, S
• Sánchez, R
• Schmidt, S
• Wehner, L
• Wraith, C
• Xie, L
• Xu, Z Y
• Yang, X F
• Yordanov, D T

Titel

Laser Spectroscopy of Neutron-Rich Tin Isotopes: A Discontinuity in Charge Radii across the N=82 Shell Closure

Ist Teil von

• Physical review letters, 2019-05, Vol.122 (19), p.192502-192502, Article 192502

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2019

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• The change in mean-square nuclear charge radii δ⟨r^{2}⟩ along the even-A tin isotopic chain ^{108-134}Sn has been investigated by means of collinear laser spectroscopy at ISOLDE/CERN using the atomic transitions 5p^{2} ^{1}S_{0}→5p6 s^{1}P_{1} and 5p^{2} ^{3}P_{0}→5p6s ^{3}P_{1}. With the determination of the charge radius of ^{134}Sn 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 ^{132}Sn 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 ^{208}Pb. 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, ^{132}Sn and ^{208}Pb, without sacrificing the overall performance. A multiple correlation analysis leads to the conclusion that both kinks are related to pairing and surface effects.