Synthetic Paths to the Heaviest Elements, W. Loveland, Oregon State University The cross section for producing a heavy reaction product in a complete fusion reaction can be written as

Cross Section Equation

where σcapture(Ecm, J) is the "capture" cross section at center of mass energy Ec.m. and spin J and Pcn is the probability that the projectile-target system will evolve inside the fission saddle point to form a completely fused system rather than re-separating (quasifission) and Wsur is the survival probability of the completely fused system.  I will present the results of experiments to characterize these quantities in heavy element synthesis reactions.