Target residue cross sections and recoil energies from the reaction of 1760 MeV 40Ar with medium and heavy targets

Abstract

Cross sections and recoil range measurements of the rare-earth isotones ( N = 84–85) formed in 40Ar induced reactions at E lab = 1.76 GeV have been performed. An electrostatic collection method associated to a gas flow transport was used. The various experimental results plead in favor of an origin of these residues in the decay of highly excited precursors. Such excited precursors can be explained by an incomplete fusion mechanism. Comparisons with existing theoretical models (an extended abrasion-ablation model and intranuclear cascade calculations) have been performed.