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Swelling of doubly magic $^{48}$Ca core in Ca isotopes beyond $N=28$
- Source :
- Phys. Rev. Lett. 124, 102501 (2020)
- Publication Year :
- 2019
-
Abstract
- Interaction cross sections for $^{42\textrm{-}51}$Ca on a carbon target at 280 MeV/nucleon have been measured for the first time. The neutron number dependence of derived root-mean-square matter radii shows a significant increase beyond the neutron magic number $N=28$. Furthermore, this enhancement of matter radii is much larger than that of the previously measured charge radii, indicating a novel growth in neutron skin thickness. A simple examination based on the Fermi-type distribution, and the Mean-Field calculations point out that this anomalous enhancement of the nuclear size beyond $N=28$ results from an enlargement of the core by a sudden increase in the surface diffuseness of the neutron density distribution, which implies the swelling of the bare $^{48}$Ca core in Ca isotopes beyond $N=28$.<br />Comment: 6 pages, 3 figures
- Subjects :
- Nuclear Experiment
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 124, 102501 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.1911.05262
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.124.102501