Proton single-particle states in the neutron-rich 23F nucleus

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

研究成果: Article査読

32 被引用数 (Scopus)

抄録

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. By comparison of the population strengths for excited states in these reactions, we deduced the character of the excited states. The levels and γ-decay scheme in 23F were proposed based on de-excitation γ-rays and the products of 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, by analysis of the population strengths and the angular distributions of the states. These single-particle 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 π d5 / 2 - π s1 / 2 and π d5 / 2 - π d3 / 2 are wider than predicted.

本文言語English
ページ(範囲)146-152
ページ数7
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
638
2-3
DOI
出版ステータスPublished - 2006 7 6

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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