Observation and Interpretation of Angular Oscillations inCa48(N14,C13)Sc49

We describe a detailed and successful experimental search for fine angular oscillations in the reaction ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$(${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$)${}_{}{}^{49}{}_{}{}^{}\mathrm{Sc}$ at a laboratory energy of 50 MeV. Also presented is a qualitative, analytic description of the reaction extracted from the distorted-wave Born-approximation partial-wave analysis in which the universality of the oscillations is clearly indicated.