Angular distributions of the polarization of neutrons produced in the ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}({}_{}{}^3{}_{}{}^{}\mathrm{He}, n){}_{}{}^{15}{}_{}{}^{}\mathrm{O}_{\mathrm{g}.\mathrm{s}.\mathrm{}}^{}{}_{}{}^{}$ reaction have been obtained at 2.95, 3.45, and 3.85 MeV. The polarization at 20° lab at six additional energies between 3.0 and 3.9 MeV was measured also. Scattering from ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ contained at a high pressure in a scintillation cell served as the neutron polarization analyzer. The three angular distributions were somewhat similar in shape, in that they showed large negative minima around 40° and 120° lab and zero or positive polarization around 80° lab. Preliminary attempts to describe the polarization using an $l=0\mathrm{}$ diproton-stripping-reaction approach were unsuccessful, but this is attributed to inadequate knowledge of the optical-model parameters.

• Received 3 June 1968

DOI:https://doi.org/10.1103/PhysRev.174.1119