Experimental and Theoretical Studies of Quasifission
- Aditya Wakhle, MSU NSCL
Thursday, September 4, 11:00 AM - Research Discussion
NSCL Lecture Hall
The quest to synthesise Super-heavy elements is at the frontier of nuclear physics research. These elements can only be formed by the fusion of two heavy nuclei. The repulsive electrostatic energy between such nuclei is extremely large and more often than not, the system re-separates prematurely into two heavy fragments, intermediate in mass compared to the original nuclei. This non-equilibrium process is called quasifission and it hinders fusion by several orders of magnitude. Only occasionally does fusion occur, resulting in the formation of a compound nucleus. Finding the variables determining the competition between quasifission and fusion is a problem currently challenging experimentalists and theoreticians.
Systematic and comprehensive measurements have been performed at the ANU's 14UD Accelerator facility using the CUBE detector to study heavy ion reactions. The large angular coverage of the CUBE fission spectrometer was used to obtain wide-ranging mass-angle distributions, at energies spanning the Coulomb barrier. I will present results from these experiments that investigate the dependence of nuclear reaction dynamics on entrance channel mass-asymmetry, charge of interacting species, deformation and specifically shell effects in the exit channel. I will also present results from theoretical work on these reactions.