Actinide cross sections from the reaction ofC13withEsg254

We have measured cross sections for the formation of actinide transfer products in the reaction of 72-MeV $^{13}\mathrm{C}$ projectiles with $^{254}\mathrm{Es}^{\mathrm{g}}$ targets. The pattern of nuclide yields is similar to those observed in the reactions of heavier ions with $^{254}\mathrm{Es}^{\mathrm{g}}$. We have constructed the primary element yields from these results and show that the total cross section for transfer reactions is 58 mb. The total reaction cross section is about 300 mb. Lawrencium isotopes are formed with larger cross sections than are consistent with the trends of the transfer-product distributions; we explain this in terms of massive transfer, and model the lawrencium yields with an evaporation code.