Origin of the structures in the /sup 12/C(/sup 16/O,. cap alpha. ) reaction: Dominance of /sup 20/Ne/sup / and /sup 16/O/sup / sequential. cap alpha. -decay processes

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.847· OSTI ID:6824474

Murakami, T; Ungricht, E; Takahashi, N; Lui, Y; Mihara, Y; Neese, R E; Takada, E; Tanner, D M; Tribble, R E; Nagatani, K

A series of experiments was carried out on the /sup 12/C(/sup 16/O,..cap alpha..) reaction to search for the population of molecular resonances as final state interactions. Contrary to our expectation, no positive evidence was found in ..cap alpha..-/sup 12/C coincidence measurements for molecular states. The experimental configuration was arranged to selectively observe events corresponding to decays into the /sup 12/C+ /sup 12/C resonance channel. A study of the incident energy dependence of the /sup 12/C(/sup 16/O,..cap alpha..) reaction clearly indicates the importance of sequential processes in the ..cap alpha..-particle yield. In particular, the process where the incident /sup 16/O picks up an ..cap alpha.. forming /sup 20/Ne( resonances and then decays back to ..cap alpha..+ /sup 16/O can reasonably explain most of observed structures in the inclusive ..cap alpha.. spectra. The sequential process caused by the inelastic excitation of /sup 16/O to /sup 16/O(..--> cap alpha..+ /sup 12/C can also contribute to the broad peaks observed in the inclusive spectra, but only in the high excitation region.

• Research Organization: Cyclotron Institute, Texas A and M University, College Station, Texas 77843
• OSTI ID: 6824474
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
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EVEN-EVEN NUCLEI
HAUSER-FESHBACH THEORY
HEAVY ION REACTIONS
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24
MAGNESIUM ISOTOPES
MEV RANGE
MEV RANGE 100-1000
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEAR THEORY
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OXYGEN 16
OXYGEN 16 REACTIONS
OXYGEN ISOTOPES
SILICON 28
SILICON ISOTOPES
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STABLE ISOTOPES
TARGETS