Complete fusion in a light heavy-ion reaction from 2.5 to 20 MeV/nucleon

Abstract

Mass distributions of evaporation-residue-like fragments have been measured using a time-of-flight system for the reaction 20Ne + 26Mg in the energy range of 51 to 400 MeV bombarding energy for 20Ne. A good mass resolution allowed for the separation of the evaporation residues and fragments from two-body reactions like e.g. damped processes. The residue distributions were compared with evaporation calculations. The analysis of velocity spectra measured at bombarding energies of 85–395 MeV showed incomplete momentum transfer for evaporation-residue-like fragments at higher energies. Statistical-model calculations and Monte Carlo methods applied to the calculation of the velocity spectra have been used to extract the complete-fusion cross section.