Polarized neutron capture onC13

The 90° cross section yield curve for the ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$(n,${\gamma }_0$ ${)\mathrm{}}^{14}$C reaction has been measured from $E_{\mathrm{n}\left(E_x\right)=5.6\mathrm{}}$(13.4) to 17.0(24.0) MeV. Angular distributions of cross section and analyzing power were measured at seven energies spanning this excitation region. In addition, the fore-aft asymmetry and 90° analyzing power were measured as a function of energy from $E_{\mathrm{n}=7.75\mathrm{}}$ to 17.0 MeV. The data were compared to direct-semidirect model calculations which included the isovector dipole and isoscalar electric quadrupole transitions. These comparisons indicate the presence of two narrow M1 resonances at $E_x$=16.5 and 17.5 MeV and that σ(E2) is less than 2% of the total capture cross section in the energy region of this experiment.