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Physical Review C 85 (2012) 014304
Resonances in 11C observed in the 4He(7Be,α)7Be and 4He(7Be,p)10B reactions
M. Freer, N.L. Achouri1, C. Angulo, N.I. Ashwood, D.W. Bardayan, S. Brown, W.N. Catford, K.A. Chipps, N. Curtis, P. Demaret, C. Harlin, B. Laurent1, J.D. Malcolm, M. Milin, T. Munoz-Britton, N.A. Orr1, S.D. Pain, D. Price, R. Raabe, N. Soic, J.S. Thomas, C. Wheldon, G. Wilson, V.A. Ziman

Measurements of the 4He(7Be,α)7Be and 4He(7Be,p)10B reactions were performed using 7Be beam energies of 7.1 and 23 MeV and a helium-4 target, employing the thick target technique. Resonances were observed between Ex(11C)=8.6 to 13.8 MeV. An R-matrix analysis was performed to characterize the spins and partial widths. This analysis showed that the observed sequence of states was consistent with that found for 7Li + α resonant scattering populating resonances in 11B. A comparison of the proposed partial widths for decay with the Wigner limit indicates that several of the states are associated with cluster-like structures.
1 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
structure nucléaire
Physique/Physique Nucléaire Expérimentale