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

Martin Freer, NL Achouri, C Angulo, Nicholas Ashwood, DW Bardayan, S Brown, WN Catford, KA Chipps, Neil Curtis, P Demaret, C Harlin, B Laurent, Jonathan Malcolm, M Milin, T Munoz-Britton, NA Orr, SD Pain, D Price, R Raabe, N SoicJS Thomas, Carl Wheldon, G Wilson, VA Ziman

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Abstract

Measurements of the He-4(Be-7, alpha)Be-7 and He-4(Be-7, p)B-10 reactions were performed using Be-7 beam energies of 7.1 and 23 MeV and a helium-4 target, employing the thick target technique. Resonances were observed between E-x(C-11) = 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 Li-7 + alpha resonant scattering populating resonances in B-11. 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.
Original languageEnglish
Pages (from-to)014304
Number of pages1
JournalPhysical Review C
Volume85
Issue number1
DOIs
Publication statusPublished - 1 Jan 2012

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