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 -,π-) 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 -,π- reaction. Moreover, such directly populated spin-flip and non-spin-flip partners were resolved for the first time.
- 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