Argon- and krypton-induced reactions at energies of 4-7 MeV/amu

Abstract

Counter telescope measurements of reactions of ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$ +${}_{}{}^{109}{}_{}{}^{}\mathrm{Ag}$ have been made at laboratory energies between 169 and 337 MeV, ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$ +${}_{}{}^{121}{}_{}{}^{}\mathrm{Sb}$ at 282 and 340 MeV, and ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ +${}_{}{}^{65}{}_{}{}^{}\mathrm{Cu}$ at 494 and 604 MeV. Measurements and results include elastic scattering, evaporation residue angular distributions and cross sections, fission plus quasifission angular distributions, kinetic energy distributions, and yields versus atomic number. Evaporation residue yields are shown to be consistent with limits predicted by evaporation calculations which include fission competition. Fusion cross sections for the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$ plus ${}_{}{}^{109}{}_{}{}^{}\mathrm{Ag}$ or ${}_{}{}^{121}{}_{}{}^{}\mathrm{Sb}$ systems are shown to be consistent with the liquid drop limit in terms of the angular momentum at which the fission barrier is estimated to go to zero. Kinetic energies of the fissionlike yields are compared with predicted values.