Polarization of Neutrons from theN14(d, n0)O15Reaction

The polarization of neutrons from the ${\mathrm{N}}^{14}(d, n_0){\mathrm{O}}^{15}$ reaction has been measured at 1.32 MeV for laboratory angles from 0 to 90 deg. The polarization is positive (using the Basel sign convention) and has a maximum value of about 0.10 at 30 deg. The neutrons were produced by bombardment of a 220-keV-thick nitrogen gas target with deuterons from The Ohio State University electrostatic accelerator. The polarization of the neutrons was determined by a measurement of the left-right asymmetry in the scattering of the neutrons from a liquid-helium scintillation counter. Time-of-flight and pulse-shape discrimination techniques were used to reduce the background. Compound nucleus and distorted-wave Born-approximation direct inter-action calculations were carried out and compared with the polarization data as well as with the available differential cross-section measurements.