Abstract
Excited states of have been investigated with the reaction at an incident-beam energy of 12 MeV. Proton groups corresponding to excited states were observed in time coincidence with the associated neutrons detected at . The natural widths of these states (or limits thereof) were obtained directly from the proton spectrum. Angular-correlation data obtained for these proton groups were analyzed according to a general formalism which allows channel spin as well as orbital angular momentum mixing in the exit channel. These analyses yield the following spin and width limitations: [ (MeV), , (keV)]; 5.91, 0 or 1, ≤47; 6.29, 2 or 3, 103±6; 6.59, 2, ≤56; and 7.78, 1, 2 or 3, 76±10. The apparent dominance of a direct-transfer mechanism for the population of these states permits further spin and parity restrictions. Information regarding the wave-function configurations for these states is discussed on the basis of the observed proton decay. Of particular interest is the observance of an -wave component in the proton decay of the 6.59-MeV state which implies an () component in the wave function of that state.
- Received 11 December 1972
DOI:https://doi.org/10.1103/PhysRevC.7.1382
©1973 American Physical Society