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