Distribution of the angle between the two fragment spins

Compute and measure the distribution $P(\cos\theta_{\mathrm{LH}})$ of the opening angle between the fragment spin vectors $J_{\mathrm{L}}$ and $J_{\mathrm{H}}$ in $252\mathrm{Cf}(\mathrm{sf})$ or $235\mathrm{U}(n_{\mathrm{th}},\mathrm{f})$. Bending modes favor antiparallel spins and wriggling modes favor parallel spins perpendicular to the fission axis, while statistical post-scission generation gives a nearly isotropic distribution; the answer is the measured distribution and which mode content it implies.

A measurement of the opening-angle distribution, for example from angular correlations of gamma rays from both fragments, compared with time-dependent density-functional predictions.