Orateur
Description
The intrinsic spin of fission fragments is closely connected to their strong deformation at scission, yet its microscopic origin remains unclear within density functional theory. Although angular momentum projection techniques reproduce spin distributions qualitatively, the role played by deformation-driven angular fluctuations has not been clearly identified. In this contribution, fission fragment spin is studied within a microscopic time-dependent density functional theory framework, with emphasis on deformation effects. Spin distributions obtained from projection methods are compared with predictions based on the uncertainty relation between orientation angle and angular momentum, using angular fluctuations estimated by Monte Carlo sampling of nucleon positions. It is shown that most of the fragment spin originates from quantum uncertainty associated with the orientation of deformed fragments, dominated by quadrupole deformation with a smaller contribution from octupole deformation.
