Abstract

The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nuclei and understanding the driving mechanism behind the shell evolution. In this work, we investigate the Z=6 spin-orbit shell gap towards the neutron dripline. To do so, we employed NA(p,2p)CA−1 quasi-free scattering reactions to measure the proton component of the 21+ state of 16,18,20C. The experimental findings support the notion of a moderate reduction of the proton 1p1/2−1p3/2 spin-orbit splitting, at variance to recent claims for a prevalent Z=6 magic number towards the neutron dripline.

Original languageEnglish
Article number135748
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume809
DOIs
Publication statusPublished - 2020 Oct 10

Subject classification (UKÄ)

  • Subatomic Physics
  • Condensed Matter Physics

Free keywords

  • Exotic nuclei
  • Magic numbers
  • Quasi-free scattering reactions
  • Shell evolution
  • Spin-orbit splitting
  • Tensor force

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