Mechanism of the ${}^{144}$Sm(${}^7$Li,${}^6$Li${}^{\text{â}}\text{ˆ}{\text{—}}_{3+}$)${}^{145}$Sm reaction at 30 MeV

In a recent experiment investigating the origin of the α particle yield in the ${}^7$Li + ${}^{144}$Sm system the measured α+d coincidences at a bombarding energy of 30 MeV were shown to arise from decay of the 2.186-MeV 3${}^{+}$ resonance of ${}^6$Li. In this work we demonstrate that the laboratory frame α particle angular distribution extracted from these data can be well described by a standard coupled channels Born approximation calculation and, furthermore, that the mechanism is dominated by direct, one-step single neutron stripping to the 3${}^{+}$ resonance, as shown previously for the ${}^7$Li + ${}^{65}$Cu and ${}^{93}$Nb systems.