Excitation Functions for Heavy-Ion-Induced Reactions on Aluminum-27

Excitation functions for a number of C¹²-, N¹⁴-, and O¹⁶-induced reactions on aluminum-27 have been studied using stacked-foil techniques and the ion beams of the Yale Heavy Ion Accelerator. The yields of Cl34,38, P³², Al28,29, Mg²⁷, Na²⁴, and F¹⁸ have been measured in the energy range from 10.5 to about 1 Mev per nucleon. The production of the radionuclides Cl34,38, P³², and in the case of C¹² irradiation Al²⁸, are due to evaporation processes from a compound-nucleus system, while the production of F¹⁸, Na²⁴, Al²⁸, Al²⁹, and Mg²⁷ seems to occur by a direct-interaction mechanism. A comparison of the yields for specific radionuclei produced by different beams is given.