Energy Dependence of Deeply Inelastic Scattering ofKr84fromPb208

Abstract

The angular distribution for deeply inelastic scattering of ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ from ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ at laboratory energies of 494, 510, and 718 MeV exhibits a strong peak that moves forward and sharpens with increasing energy. Forward peaking never becomes prominent. The integrated cross section is nearly equal to the total absorption cross section at all energies. These results are inconsistent with a unique critical radius for fusion and are in contrast to those for systems with lower $\frac{Z_1}{Z_2}$ product.