Angular-Momentum Transfer in Deeply Inelastic Scattering of 610-MeVKr86byBi209

Abstract

For the reaction 610-MeV ${}_{}{}^{86}{}_{}{}^{}\mathrm{Kr}$ + ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}$, angular correlations of fragments from fissioning heavy reaction products have been measured with respect to the recoil direction, both in and out of the reaction plane. The deduced angular momentum of the recoil particle is large, $\mathrm{}(50-70)\mathrm{}\hslash$, and is consistent with that of the sticking limit and greater than that of the rolling limit. This result demonstrates the importance of the tangential component of the frictional force.