Proton Distribution Radii of 16–24O: Signatures of New Shell Closures and Neutron Skin
Journal Article
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· Physical Review Letters
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- Saint Mary's Univ., Halifax NS (Canada); Dalhousie Univ., Halifax, NS (Canada)
- Saint Mary's Univ., Halifax NS (Canada); TRIUMF, Vancouver, BC (Canada)
- Osaka Metropolitan University (Japan); Hokkaido Univ., Sapporo (Japan)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Tennessee, Knoxville, TN (United States); TRIUMF, Vancouver, BC (Canada)
- TRIUMF, Vancouver, BC (Canada)
- Darmstadt Univ. of Technology (Germany); GSI-Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany)
- Nihon Univ., Tokyo (Japan)
- GSI-Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany)
- Saint Mary's Univ., Halifax NS (Canada)
- Universidade de Santiago de Compostela (Spain)
- Saint Mary's Univ., Halifax NS (Canada); GSI-Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany)
- GSI-Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany); Justus-Liebig Univ., Giessen (Germany)
- Comenius Univ., Bratislava (Slovakia)
- Osaka Univ. (Japan)
- Univ. of Tokyo (Japan); RIKEN, Saitama (Japan)
- Osaka Univ. (Japan); Beihang Univ. (China)
- Beihang Univ. (China)
The root mean square radii of the proton density distribution in 16–24O derived from measurements of charge changing cross sections with a carbon target at ~900A MeV together with the matter radii portray thick neutron skin for 22–24O despite 22,24O being doubly magic. Imprints of the shell closures at N=14 and 16 are reflected in local minima of their proton radii that provide evidence for the tensor interaction causing them. The radii agree with ab initio calculations employing the chiral NNLOsat interaction, though skin thickness predictions are challenged. Furthermore, shell model predictions agree well with the data.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); Japan Society for the Promotion of Science (JSPS); German Research Foundation (DFG)
- Grant/Contract Number:
- AC05-00OR22725; SC0018223; 23224008; JP18K03635; JP19K03855; JP19H05145; JP21H00117; 279384907
- OSTI ID:
- 1891384
- Journal Information:
- Physical Review Letters, Vol. 129, Issue 14; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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