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

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