The right-left asymmetry of $\mathrm{D}(d, n){\mathrm{He}}^3$ neutrons scattered by ${\mathrm{C}}^{12}$ was observed for various neutron emission angles, deuteron bombarding energies, and ${\mathrm{C}}^{12}(n, n)$ scattering angles. Using a figure for carbon polarization based on a ${\mathrm{C}}^{12}(n, n)$ phase shift analysis, the maximum neutron polarization was found to be (10.6±1.0)% for neutrons produced at 53° (c.m.) by 600-700 kev deuterons on a thick target. Observation of the right-left asymmetry for different neutron scattering angles yielded a $sin2\theta$ angular dependence of the carbon polarization in agreement with the prediction of the ${\mathrm{C}}^{12}(n, n)$ phase shift analysis.

• Received 5 April 1956

DOI:https://doi.org/10.1103/PhysRev.104.718