Proton Shell Structure in Neutron-rich 23F

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The proton shell structure in neutron-rich fluorine 23F was investigated using the in-beam γ-ray spectroscopy technique via the proton transfer reaction onto the 22O nucleus. We also measured the α inelastic scattering on 23F, the neutron knockout from 24F, and the two-nucleon knockout from 25Ne using a cocktail secondary beam. The excited states were identified by de-excitation γ-rays coincident with outgoing 23F, and we found the proton single-particle states at 2268 and 4059 keV by comparison of the population strengths among these reactions. These states were respectively assigned to have =0 and =2 by the angular distributions obtained in the transfer reaction, and therefore they were considered to have the configurations of πs1/2 and πd3/2. The excitation energies of these states are located at higher excitation energies than the shell model predictions for the USD and SDPF-M interactions, which may indicate that the centroid energy gaps between πd5/2 and πs1/2 are wider than predictions.

References (10)

  • H. Ryuto

    Nucl. Instrum. Methods A

    (2005)
  • S. Michimasa

    Phys. Lett. B

    (2006)
  • N.A. Orr

    Nucl Phys. A

    (1989)
  • E. Sauvan

    Phys. Lett. B

    (2000)
  • B.H. Wildenthal

    Prog. Part. Nucl. Phys.

    (1984)
There are more references available in the full text version of this article.

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