An experiment using the ${}^{11}$B(${}^3$He,$d$)${}^{12}$C reaction was performed at iThemba LABS at an incident energy of 44 MeV and analyzed with a high energy-resolution magnetic spectrometer, to reinvestigate states in ${}^{12}$C published in 1971. The original investigation reported the existence of an 11.16 MeV state in ${}^{12}$C that displays a 2${}^{+}$ nature. In the present experiment, data were acquired at laboratory angles of 25${}^{\circ }$, 30${}^{\circ }$, and 35${}^{\circ }$, which is part of the center-of-mass (c.m.) angle range in the original measurements where a clear signature of such a state was observed. These new low-background measurements revealed no evidence of the previously reported state at 11.16 MeV in ${}^{12}$C.

• Received 19 June 2012

DOI:https://doi.org/10.1103/PhysRevC.86.037301