DIFFERENTIAL CROSS-SECTIONS OF PROJECTILE-LIKE FRAGMENTS FROM O-18 AND AR-40 AT E A=80 MEV/

Measurements of differential cross sections at 0-degrees for projectil elike fragments from O-18 and Ar-40 projectiles at E/A = 80 MeV are pr esented and are compared with the predictions of the abrasion-ablation model, the internuclear cascade model, a high-energy empirical parame trization, and a simple cluster breakup model. The data for both proje ctiles are in good agreement with the high-energy systematics. The abr asion-ablation and internuclear cascade models can adequately describe the cross sections of fragments from Ar-40 with large mass losses, wh ereas the cluster breakup model can describe the relative cross sectio ns of few-nucleon removal products from both projectiles.