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Continuum Discretized Coupled Channels (CDCC) Calculations for reactions of 6Li with several targets
In this descriptive talk, a presentation is made of the effects on elastic scattering cross sections of 6Li with various targets (28Si, 58Ni and 144Sm) due to the resonances l=2 ( J = 3+, 2+ and 1+ ) of 6Li. The model of Coupled Channels in the continuum is used in the calculations, that is, since 6Li is a weakly bound nucleus, easily breaks up into fragments, deuteron and alpha particles, that among other reaction mechanisms, can fly apart into the continuum. So, this continuum energy space is represented by a disctretized space as fine and extense as necessary for each nuclear system and bombarding energy. A system of coupled-channel equations is obtained from this discretized energy space which are solved numerically. Nuclear potentials, between fragment-fragment, fragment+target are taken from systematic studies made for a large number of systems and energies.
Resonance energies of the system, deuteron+alpha, as well as resonance widths are correctly introduced into the continuum spectrum, so by manipulating this resonance energy space, their effects on several nuclear reaction mechanisms can be studied. In particular, in this talk, we present the effects of the resonance continuum on the elastic scattering angular distributions. Our calcultions show in general a good agreement with the data.