Fusion cross-section of the Li-7+B-11 reaction

The Li-7 + B-11 reaction has been investigated in the energy range 5.5 MeV < E-lab < 19 MeV: by detecting gamma-ray resulting from the de-excitation o f evaporation residues. Statistical compound-nucleus calculations have been performed in order to extract both the cross-sections of individual exit c hannels and the fusion cross-section of the system. The total angular momen tum that the compound nucleus O-18 can support has been deduced and is seen to exhibit saturation for a limiting value of 8.5 (h) over bar at the high -energy extreme. The results are discussed in terms of the entrance channel and statistical yrast line limitations.