Role of {sup 8}Be heavy stripping mechanism in the {alpha} + {sup 12}C inelastic scattering to the near-3{alpha}-threshold states in {sup 12}C
- Universidad Autonoma del Estado de Mexico (Mexico)
- NRC Kurchatov Institute (Russian Federation)
- Estado de Mexico, Instituto Tecnologico del Valle de Toluca (Mexico)
The angular distributions of {alpha} + {sup 12}C elastic and inelastic (to the 4.44 MeV, 2{sup +}; 7.65MeV, 0{sup +}; and 9.64MeV, 3{sup -} states) scattering at 110 MeV are characterized by pronounced enhancement and strong oscillations at large angles. We performed calculations of the differential cross sections of these reactions assuming a potential scattering in the forward hemisphere and the direct transfer of {sup 8}Be cluster {theta}{sub c.m.} > 90 Degree-Sign . We showed that the {alpha} + {sup 8}Be cluster configuration with relative angular momentum L = 0 dominates in the Hoyle state being 4.4 times larger than that in the ground state. This result also contributes to the verification of {alpha}BEC hypothesis and is consistent with the conjecture of a dilute 3{alpha} structure of the Hoyle state. In the 9.64 MeV, 3{sup -} state, a positive interference of all allowed {alpha} + {sup 8}Be configurations with a dominance of the p-orbital (49%) {alpha}-{sup 8}Be relative motion is found. This finding manifests the exotic 3{alpha}, but hardly condensed structure of the 9.64-MeV 3{sup -} state in {sup 12}C.
- OSTI ID:
- 22043829
- Journal Information:
- Physics of Atomic Nuclei, Vol. 74, Issue 11; Other Information: Copyright (c) 2011 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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