Fragment Spin Orientation Following Deep-Inelastic Scattering

Yields of discrete $\gamma$ transitions in coincidence with deep-inelastic fragments identified in a particle telescope have been measured as a function of $Q$ value and $Z$ from the scattering of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ with ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$ at 100 MeV. The anisotropies in the $\gamma$-particle angular correlations indicate a high degree of spin alignment in the fragments. This, as well as the deduced value of the internal angular momentum, is consistent with sticking of the fragments prior to scission.