Time-Dependent Hartree-Fock Fusion Calculations forKr86+La139andKr84+Bi209Collisions

Abstract

Time-dependent Hartree-Fock fusion calculations are presented for head-on collisions of ${}_{}{}^{86}{}_{}{}^{}\mathrm{Kr}$ + ${}_{}{}^{139}{}_{}{}^{}\mathrm{La}$ and ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ + ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}$. A large fusion region is found for moderately high energies above the Coulomb barrier, and a lower limit for the fusion cross section of ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}+{}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}\to {}_{119}{}^{293}{}_{}{}^{}X_{}^{*}{}_{}{}^{}$ is estimated from non-head-on collisions. Also, fusionlike behavior is found for a narrow range of energies near the barrier.