Abstract
Ellipsoidal deformations have been introduced in the entrance channel of asymmetric heavy-ion reactions within the liquid-drop model and including the nuclear proximity energy. The corresponding maximal lowering of the fusion barrier heights is about 10 MeV and takes place for Z1Z2 approximately=750. When Z1Z2<or=650-750 and with regard to the two-sphere configuration, the barrier is more external and its width is reduced. At the top, a transition to prolate shapes occurs due to the increase of the proximity force effects. For Z1Z2>or=650-750, the barrier occurs at smaller inter-nuclear distances and corresponds to the transition from two-body shapes to one-body compact and creviced configurations. Before the neck formation, the heaviest colliding ion has a prolate shape while the lightest one is oblate. The sub-barrier fusion enhancement might be explained by the release of the deformation degree of freedom, the reaction time allowing some adiabaticity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Physics G: Nuclear and Particle Physics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
