He-5+alpha cluster model of Be-9 breakup - art. no. 031602

We present here for the first time continuum-discretised-coupled-channels ( CDCC) calculations for the elastic scattering and breakup of Be-9+ C-12. We employ a two-body cluster-folding (CF) model picture of Be-9, which is con sidered as a He-5 core plus a He-4 cluster. The calculations agree well wit h data for elastic scattering and excitation of the 5/2(-) resonance of Be- 9 at 2.43 MeV. The cross section for excitation of the 1/2(+) resonance at 1.68 MeV is not well described by our model. the calculations being conside rably smaller than the data. This is as expected from structure calculation s of Be-9, which suggest that this state is almost exclusively of Be-8+n cl uster form.