Fission Fragment Spin Correlations

In nuclear fission, the primary fragments typically carry half a dozen units of angular momentum whose directions and correlations reflect the underlying dynamical mechanisms. Concentrating on the nucleon-exchange mechanism, this presentation describes how the fragment spins are generated, why they should be expected to be oriented preferentially perpendicular to the fission axis, and how they emerge as largely uncorrelated even though they are built up of highly correlated contributions.