Actinide Production in Collisions ofU238withCm248

Cross sections for the production of heavy actinides in damped collisions of ${}_{}{}^{238}{}_{}{}^{}\mathrm{U}$ ions with ${}_{}{}^{248}{}_{}{}^{}\mathrm{Cm}$ targets are reported and compared with similar data for other projectiles. The relatively small differences in the formation rates of a given isotope made by different projectiles indicate a balance between increased mass transfer probability with increasing projectile mass and a concurrent decrease in survivability because of an increase in excitation energy.