Abstract
Low-energy -delayed fission of and was studied in detail at the mass separator ISOLDE at CERN. The fission-fragment mass distributions of daughter nuclei and indicate a triple-humped structure, marking the transition between asymmetric fission of and symmetric fission in the light Ra-Rn nuclei. Comparison with the macroscopic-microscopic finite-range liquid-drop model and the self-consistent approach employing the Gogny D1S energy density functional yields discrepancies. This demonstrates once more the need for dynamical fission calculations, because for both models the potential-energy surfaces lack pronounced structures, in contrast to those for the actinide region.
- Received 27 June 2014
- Revised 29 August 2014
DOI:https://doi.org/10.1103/PhysRevC.90.041301
©2014 American Physical Society