L dependence in angular distributions of the two-proton transfer reaction Ca48(O16, C14)Ti50

The reaction Ca48(O16, C14)Ti50 to the lowest O+, 2+, 4+, and 6+ states of Ti50 has been studied at 56 MeV. Rapid oscillations in the angular distribution persist to extreme forward angles (θL=3°). In the present data, the forward-angle structure is found to be an unambiguous indicator of the transferred angular momentum. The data are reproduced by distorted-wave Born-approximation calculations. A qualitative understanding is obtained in the strong-absorption model. It is believed that such behavior will occur in many heavy-ion-induced transfer reactions.