Heavy-Ion Resonances in Angular-Momentum-Unfavored Channels

Abstract

The systems $^{16}\mathrm{O}$+$^{12}\mathrm{C}$ and $^{16}\mathrm{O}$+$^{16}\mathrm{O}$ have been studied in the inelastic channel leaving $^{16}\mathrm{O}$ in the 6.05-MeV excited ${0}^{+}$ state. This channel has a grazing angular momentum \ensuremath{\sim}2.5 units less than the elastic channel. Surprisingly, the excitation functions show pronounced peaks which are closely correlated with the well-matched $^{16}\mathrm{O}$(${3}^{\ensuremath{-}}$, 6.13 MeV) channel. This correlation demonstrates the importance of the wave reflected from the interior of the ion-ion potential.