Scattering of Polarized 3.25-MeV Neutrons by Medium Weight Nuclei

The polarization produced in the 90° elastic scattering of 3.25-MeV neutrons from Fe, Ni, Co, Cu, Zr, and Mo was measured. The $\mathrm{D}(d, n){\mathrm{He}}^3$ reaction was used as a source of partially polarized neutrons to determine the scattering asymmetry. The variation of the measured values with the atomic weight indicates a resonances structure similar to that observed by Clement et al. at 380 keV but with the polarization ranging from approximately -0.5 to +0.4. In addition, polarization measurements of neutrons scattered by C and W were performed.