Differential cross sections of projectilelike fragments from [sup 18]O and [sup 40]Ar at [ital E]/[ital A]=80 MeV

Measurements of differential cross sections at 0[degree] for projectilelike fragments from [sup 18]O and [sup 40]Ar projectiles at [ital E]/[ital A]=80 MeV are presented and are compared with the predictions of the abrasion-ablation model, the internuclear cascade model, a high-energy empirical parametrization, and a simple cluster breakup model. The data for both projectiles are in good agreement with the high-energy systematics. The abrasion-ablation and internuclear cascade models can adequately describe the cross sections of fragments from [sup 40]Ar with large mass losses, whereas the cluster breakup model can describe the relative cross sections of few-nucleon removal products from both projectiles.