Selective alpha particle decay of C12+C12 resonances to excited Ne20 rotational bands observed in the C12(C12,α)Ne20 reaction

R. J. Ledoux, C. E. Ordon̄ez, M. J. Bechara, H. A. Al-Juwair, G. Lavelle, and E. R. Cosman
Phys. Rev. C 30, 866 – Published 1 September 1984
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Abstract

Excitation functions of the C12(C12,α)Ne20 reaction were measured at θlab=7.5° between Ec.m.=1440 MeV and angular distributions were measured from Ec.m.=17.8 to 20.6 MeV. Summed yields reveal prominent intermediate structure resonances over the entire range which correlate well to resonances previously observed in elastic data. The resonances show enhanced decays to excited rotational bands in Ne20 with reduced widths comparable to those for the elastic channel and an order of magnitude greater than those for the Ne20 ground state band. A discussion is given of the resonances as shape-isomeric states in a shell model secondary minimum in Mg24, and of the selective alpha decay as being transitions to states of related configuration in Ne20.

  • Received 28 March 1983

DOI:https://doi.org/10.1103/PhysRevC.30.866

©1984 American Physical Society

Authors & Affiliations

R. J. Ledoux, C. E. Ordon̄ez, M. J. Bechara*, H. A. Al-Juwair, G. Lavelle, and E. R. Cosman

  • Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

  • *Present address: Instituto de Física, Universidade de São Paulo, São Paulo, Brazil.

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Vol. 30, Iss. 3 — September 1984

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