Disappearance of the N=14 shell gap in the carbon isotopic chain

M. Stanoiu, D. Sohler, O. Sorlin, F. Azaiez, Zs Dombrádi, B. A. Brown, M. Belleguic, C. Borcea, C. Bourgeois, Z. Dlouhy, Z. Elekes, Zs Fülöp, S. Grévy, D. Guillemaud-Mueller, F. Ibrahim, A. Kerek, A. Krasznahorkay, M. Lewitowicz, S. M. Lukyanov, S. MandalJ. Mrázek, F. Negoita, Yu E. Penionzhkevich, Zs Podolyák, P. Roussel-Chomaz, M. G. Saint-Laurent, H. Savajols, G. Sletten, J. Timár, C. Timis, A. Yamamoto

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Abstract

The structure of 617-20C nuclei was investigated by means of the in-beam γ-ray spectroscopy technique using fragmentation reactions of radioactive beams. Based on particle-γ and particle-γγ coincidence data, level schemes are constructed for the neutron-rich C17-20 nuclei. The systematics of the first excited 2+ states in the carbon isotopes is extended for the first time to A=20 showing that in contrast to the case of the oxygen isotopes, the N=14 subshell closure disappears. Experimental results are compared with shell-model calculations. Agreement between them is found only if a reduced neutron-neutron effective interaction is used. Implications of this reduced interaction in some properties of weakly bound neutron-rich Carbon are discussed.

Original languageEnglish
Article number034315
JournalPhysical Review C - Nuclear Physics
Volume78
Issue number3
DOIs
Publication statusPublished - Sep 23 2008

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Stanoiu, M., Sohler, D., Sorlin, O., Azaiez, F., Dombrádi, Z., Brown, B. A., Belleguic, M., Borcea, C., Bourgeois, C., Dlouhy, Z., Elekes, Z., Fülöp, Z., Grévy, S., Guillemaud-Mueller, D., Ibrahim, F., Kerek, A., Krasznahorkay, A., Lewitowicz, M., Lukyanov, S. M., ... Yamamoto, A. (2008). Disappearance of the N=14 shell gap in the carbon isotopic chain. Physical Review C - Nuclear Physics, 78(3), [034315]. https://doi.org/10.1103/PhysRevC.78.034315