Excited state transfers in the12C(6Li→,α)14Nreaction

Abstract

The ${}^{12}\mathrm{C}{(}^{6}\mathrm{Li}\ensuremath{\rightarrow},\ensuremath{\alpha}{)}^{14}\mathrm{N}$ reaction cross section, and analyzing powers to the ${2}^{+}$ (7.03 MeV) natural parity state of ${}^{14}\mathrm{N}$ have been studied by coupled reaction channels calculations that include deuteron cluster transfer from the ${1}^{+}$ ground and ${3}^{+},$${2}^{+},{1}^{+}$ spin-orbit triplet excited states in ${}^{6}\mathrm{Li}$ as well as from the first ${2}^{+}$ excited state in ${}^{12}\mathrm{C}$ to assess the role played by these inelastic transfers. This natural parity transition was chosen for detailed study because the number of L transfers allowed is more limited than for transfers to unnatural parity states. Inclusion of the transfer from the ${1}^{+}$ excited state of ${}^{6}\mathrm{Li}$ is especially vital for understanding the tensor analyzing power data ${T}_{21}.$ The same analysis was then applied to the transfers to the ${1}^{+}$ ground and 3.95 MeV states in ${}^{14}\mathrm{N}.$ Failure to describe the shape of the ground state angular distribution motivated its remeasurement and its anomalous shape was confirmed. The present work suggests that single nucleon sequential transfer might be the dominant mode for the ground state transfer.