PROJECTILE DELTA-EXCITATION IN ALPHA-PROTON SCATTERING

The (alpha,alpha') reaction in the Delta-region is a clear example of projectile delta excitation. We study the reaction theoretically and c ompare the results to a recent experiment. The agreement is rather goo d. On the other hand the reaction offers a test for models of coherent pion production. Finally, the use of the present model should provide the appropriate background to extract the excitation strength of the Roper resonance observed in the same reaction.