Angular Momentum Transfer in Reactions Induced by 14N Ions on 154Sm

The angular momentum input in reactions induced by 151 MeV 14N ions on 154Sm has been investigated by measuring the gamma-ray multiplicity in coincidence with emitted charged particles. The average multiplicity of gamma-ray cascades following the emission of protons, deuterons and tritons in reactions leading to 158Er amounts to 17.5 which is far below the value 31, earlier reported for a bombarding energy of 167 MeV. Predictions by Wilczynski's sum-rule model for complete and incomplete fusion reactions combined with statistical evaporation of particles are in good agreement with the present results.