| Institution: | (1) Department of Physics, Tohoku University, 980-8578 Sendai, Japan;(2) Department of Physics, Osaka University, 560-0043 Toyonaka, Japan;(3) Department of Physics, Kyoto University, 606-8502 Kyoto, Japan;(4) Brookhaven National Laboratory, 11973 Upton, NY, USA;(5) GSI, D-64291 Darmstadt, Germany;(6) Carnegie Mellon University, 15213 Pittsburgh, PA, USA;(7) Department of Physics, University of Freiburg, D-79104 Freiburg, Germany;(8) Institute of Particle and Nuclear Studies, KEK, 305-0801 Tsukuba, Japan;(9) Department of Physics, Gifu University, 501-1193 Gifu, Japan;(10) Department of Physics, Hampton University, 23668, VA, USA;(11) RIKEN, 351-0198 Wako, Japan;(12) Department of Physics, CIAE, P. O. Box 275(80), 102413 Beijing, China |
| Abstract: | 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. |
