Abstract
The change in mean-square nuclear charge radii along the even- tin isotopic chain has been investigated by means of collinear laser spectroscopy at ISOLDE/CERN using the atomic transitions and . With the determination of the charge radius of and corrected values for some of the neutron-rich isotopes, the evolution of the charge radii across the shell closure is established. A clear kink at the doubly magic is revealed, similar to what has been observed at in other isotopic chains with larger proton numbers, and at the shell closure in doubly magic . 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, and , without sacrificing the overall performance. A multiple correlation analysis leads to the conclusion that both kinks are related to pairing and surface effects.
- Received 22 February 2019
- Revised 22 March 2019
DOI:https://doi.org/10.1103/PhysRevLett.122.192502
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Published by the American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Tin Gets Kinky
Published 16 May 2019
The observation that tin nuclei suddenly increase in size when the number of neutrons they contain reaches a “magic” number helps test models of nucleon interactions.
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