Sixteen heavy ion induced fusion excitation functions are analyzed using Swiatecki's new dynamic model. The systems selected span a target-projectile range between ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$+${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ to ${}_{}{}^{86}{}_{}{}^{}\mathrm{Kr}$+${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}$. The effective threshold and extra energy parameters were held at the values deduced by Swiatecki from ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ induced reactions, in order to display systematic scaling behavior with target and projectile mass and angular momentum. Agreement between experimental results and model predictions seem excellent for most systems investigated. A tendency to go from a rolling to sliding friction mode is noted as one goes to lighter systems. There is also some indication that the threshold parameter may decrease for lighter systems.

NUCLEAR REACTIONS Heavy ion fusion excitation functions, compared with predictions of new dynamic fusion model of Swiatecki.

• Received 26 March 1982

DOI:https://doi.org/10.1103/PhysRevC.26.465