Synthetic Paths to the Heaviest Elements

Abstract

The cross section for producing a heavy reaction product, $\sigma$${}_{EVR}$, can be represented by the equation σ_{EVR} = \sum_{J=0}^{J_\max} σ_{capture} (E_{c.m.},J) P_{CN} (E^*,J) W_{sur}(E^*,J), where ${\sigma }_{capture}(E_{c.m.},J)$ is the capture cross section at center of mass energy E${}_{c.m.}$ and spin J. P${}_{CN}$ is the probability that the projectile-target system will evolve from the contact configuration inside the fission saddle point to form a completely fused system rather than re-separating (quasifission, fast fission). W${}_{sur}$ is the probability that the completely fused system will de-excite by neutron emission rather than fission. I discuss results of experiments that characterize these quantities in heavy element synthesis reactions. I also discuss the possibilities of synthesizing heavy nuclei using damped collisions and reactions using radioactive beams.

Talk given by Walter Loveland at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, May 27-June 1, 2012. To appear in the NN2012 Proceedings in Journal of Physics: Conference Series (JPCS)

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