Single-particle states in 23F

S. Michimasa, S. Shimoura, H. Iwasaki, M. Tamaki, S. Ota, N. Aoi, H. Baba, N. Iwasa, S. Kanno, S. Kubono, K. Kurita, M. Kurokawa, T. Minemura, T. Motobayashi, M. Notani, H. J. Ong, A. Saito, H. Sakurai, E. Takeshita, S. TakeuchiY. Yanagisawa, A. Yoshida

Research output: Contribution to journalArticlepeer-review


The proton single-particle states have been investigated using the in-beam γ-ray spectroscopy technique via the following reactions: 4He(22O,23F); 4He( 23F,23F); 4He(24F,23F); and 4He(25Ne,23F). The characters of excited states in 23F were deduced by comparison of the population strengths in these reactions. We found that the 2268- and 4059-keV levels have strong proton single-particle nature of the s1/2 and d3/2 orbitals, respectively. These singleparticle states are located at higher excitation energies than the shell model predictions for the USD and SDPF-M interactions, which indicates that the centroid energy gaps for πd5/2-πs1/2 and πd 5/2-πd3/2 are wider than predicted.

Original languageEnglish
Article number047
Pages (from-to)196-197
Number of pages2
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2006 Oct 10

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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