Measurement of theC12(d,n)N13Cross Section for Energies from 3.8 to 5.0 MeV

Yield curves at 5°, 40°, 80°, 115°, and 150° were measured for the ${\mathrm{C}}^{12}\mathrm{}(d,n)\mathrm{}{\mathrm{N}}^{13}$ (g.s.) reaction from 3.8 to 4.1 MeV in about 10-keV steps in search for a resonance about 40 keV wide, superimposed on a broader one. The existence of the narrower resonance near 3.91 MeV was suggested by Verba who previously measured and analyzed cross sections for the same reaction. No indication of this resonance was seen in earlier work at this laboratory on the same reaction or in studies of the mirror reaction. The results of the present experiment do not exhibit the structure which would be produced by the proposed 40-keV resonance. Thus, it appears that the calculation of Buck and Satchler concerning changes in polarization around an isolated resonance still is applicable to the 4.0-MeV resonance in the ${\mathrm{C}}^{12}+d$ reactions. A second experiment was conducted in preparation for a polarization study at higher energies in the reaction. With a 50-keV target, a 5° yield curve was obtained up to 5.0 MeV. Only one broad peak was exhibited in the ${\mathrm{C}}^{12}\mathrm{}(d,n)\mathrm{}{\mathrm{N}}^{13}$ (g.s.) reaction between 4.1 and 5.0 MeV. No sizable structure appeared for the reaction ${\mathrm{C}}^{12}\mathrm{}(d,n)\mathrm{}{\mathrm{N}}^{13*}$ (2.37 MeV) in the 5° yield. Angular distributions of the neutrons for both reactions were measured at 105-keV intervals. All distributions showed strong stripping patterns.