Origin of the structures in the 12C(16O,α) reaction: Dominance of 20Ne* and 16O* sequential α-decay processes
Abstract
A series of experiments was carried out on the 12C(16O,α) reaction to search for the population of molecular resonances as final state interactions. Contrary to our expectation, no positive evidence was found in α-12C coincidence measurements for molecular states. The experimental configuration was arranged to selectively observe events corresponding to decays into the 12C+12C resonance channel. A study of the incident energy dependence of the 12C(16O,α) reaction clearly indicates the importance of sequential processes in the α-particle yield. In particular, the process where the incident 16O picks up an α forming 20Ne* resonances and then decays back to α+16O can reasonably explain most of observed structures in the inclusive α spectra. The sequential process caused by the inelastic excitation of 16O to 16O*-->α+12C can also contribute to the broad peaks observed in the inclusive spectra, but only in the high excitation region.
- Publication:
-
Physical Review C
- Pub Date:
- March 1984
- DOI:
- 10.1103/PhysRevC.29.847
- Bibcode:
- 1984PhRvC..29..847M