https://doi.org/10.1051/epjconf/202328404004
Generation of Fragment Angular Momentum in Nuclear Fission
1 Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
2 Physics Division, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
3 Physics Department, University of California, Davis, CA 95616, USA
4 Niels Bohr Institute, DK-2100 Copenhagen, Denmark
* e-mail: JRandrup@LBL.gov
Published online: 26 May 2023
As a fissioning nucleus approaches scission, the angular-momentum bearing modes in the evolving dinuclear complex may be agitated by multiple transfers of individual nucleons. It is discussed how this mechanism populates the various rotational modes at different rates and leads to fragment angular momenta that are preferentially perpendicular to the fission axis but mutually largely uncorrelated. Using the fission simulation code FREYA, it is demonstrated how a measurement of the angular distribution of photons from identified collective transitions in the product nuclei can provide quantitative information on the relative importance of the twisting mode in fission.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
