Resonances in 11C observed in the 4He(7Be,α)7Be and 4He(7Be,p)10B reactions

Abstract : 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.
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Submitted on : Tuesday, January 10, 2012 - 11:07:14 AM
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M. Freer, N.L. Achouri, C. Angulo, N.I. Ashwood, D.W. Bardayan, et al.. Resonances in 11C observed in the 4He(7Be,α)7Be and 4He(7Be,p)10B reactions. Physical Review C, American Physical Society, 2012, 85, pp.014304. ⟨10.1103/PhysRevC.85.014304⟩. ⟨in2p3-00658279⟩

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