Fragment Spin Orientation in Deep-Inelastic Reactions from Anisotropy Measurements of ContinuumγRays

The in-plane and out-of-plane anisotropy has been measured for $\gamma$ rays in coincidence with deep-inelastic products from the 1064-MeV ${}_{}{}^{136}{}_{}{}^{}\mathrm{Xe}$+${}_{}{}^{197}{}_{}{}^{}\mathrm{Au}$ reaction. The $\gamma$-ray energy spectra exhibit a bump corresponding to a dominantly stretched-$E2\mathrm{}$ cascade, but only a small out-of-plane anisotropy, indicating a misalignment of the fragment spins. A simple model is used to extract a rms misalignment angle of 34°±7°.