Effect of the exit reaction channels on ${}^6\mathrm{Li}+{}^{18}\mathrm{O}$ elastic scattering

The most pronounced reaction channels in the ${}^6\mathrm{Li}+{}^{18}\mathrm{O}$ system were studied by means of the continuum-discretized coupled-channel and coupled-reaction-channel methods to investigate their effects on the elastic scattering. It is shown that, whereas breakup coupling provides no contribution to the observed rise in the backward-angle elastic scattering angular distribution, coupling to the single-neutron pickup alone enhances the elastic scattering cross section in this region by up to two orders of magnitude.

Figure 1

Comparison of model calculations with the elastic scattering data. The solid curve denotes the result of a microscopic CDCC calculation that includes the effect of ${}^6\mathrm{Li}$ breakup. The dashed curve shows the result with the breakup couplings omitted while an OM calculation using a global ${}^6\mathrm{Li}$ potential [13] is plotted as the dot-dashed curve.

Figure 2

Angular distributions of the one-neutron pickup reactions leading to the ground and first excited states of ${}^{17}\mathrm{O}$. The dotted curves correspond to a CRC calculation with the OM potential in the exit channel taken from Ref. [13]. The other curves denote the results of calculations with the effective OM potential obtained by Rudchik et al. [2] in the prior (solid curves) or post (dashed curves) representation. See text for details.

Figure 3

Effect of the pickup channels on the elastic scattering of ${}^6\mathrm{Li}+{}^{18}\mathrm{O}$. The curves correspond to CRC calculations with the exit channel OM potential from [2] (solid) and from [13] (dotted), as in Fig. 2.