Observation of the 7 MeV excited spin-flip and non-spin-flip partners in 16 Λo by γ -ray spectroscopy

M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. NagaeS. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, L. Yuan, S. H. Zhou

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We have observed three γ -ray transitions in Λ 16 O from both 7MeV excited spin-flip and non-spin-flip partners ( 2-, 1- 2 to the ground-state doublet ( 1 - 1, 0- via the 16O(K --) reaction. The 7MeV excitation energies of the spin-doublet members ( 2-, 1- 2 were determined to be 6784±4±4 keV and 6562±1±2 keV, respectively, and thus the spacing was obtained to be 222±4±5 keV. This is the first observation of the spin-flip state directly populated by the ( K -- reaction. Moreover, such directly populated spin-flip and non-spin-flip partners were resolved for the first time.

Original languageEnglish
Pages (from-to)247-250
Number of pages4
JournalEuropean Physical Journal A
Issue number3
Publication statusPublished - 2007 Sept 1


  • 13.75.Ev Hyperon-nucleon interactions
  • 21.80.+a Hypernuclei
  • 23.20.Lv γ transitions and level energies

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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