One- and Multi-Step Processes in the ReactionNd144(C12,C14)

Two very different types of angular distributions, one having a normal bell shape and the other being much more constant with angle were observed in the reaction ${}_{}{}^{144}{}_{}{}^{}\mathrm{Nd}$(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}$) for two well-known $2^{+}$ states of ${}_{}{}^{142}{}_{}{}^{}\mathrm{Nd}$. The fits to these angular distributions using the distorted-wave Born approximation and/or coupled-channel Born approximation confirms the conclusion that the data give definite evidence for the importance of multistep processes. A comparison with the reaction ${}_{}{}^{144}{}_{}{}^{}\mathrm{Nd}(p, t)$ is also discussed.