Abstract
The fission probability of has been measured using the (,df) reaction with an energy resolution of 11 keV in the excitation energy region of MeV. A number of sub-barrier fission resonances have been observed for the first time in the excitation energy range below MeV and interpreted as rotational bands with a rotational parameter characteristic to a hyperdeformed nuclear shape ( keV). The angular distribution of the associated fission fragments was measured to deduce the value of the rotational bands. The fission barrier parameters of have been determined by analyzing the overall features of the fission probability. A deep third minimum with an excitation energy of MeV and rather low inner barrier height of MeV could be established.
- Received 27 February 2009
DOI:https://doi.org/10.1103/PhysRevC.80.011301
©2009 American Physical Society