The polarization of five proton groups from the reactions ${\mathrm{C}}^{12}(d, p){\mathrm{C}}^{13}$ and ${\mathrm{Si}}^{28}(d, p){\mathrm{Si}}^{29}$ has been measured at several proton angles at a deuteron energy of 11.9 Mev. In the case of the carbon ground-state group, the sign of the polarization agrees with the measurement of Hillman using 4.05-Mev deuterons and with the calculations of Cheston for 3.29-Mev deuterons. The largest value of the polarization was measured for the carbon ground-state group, with the value -0.49±0.13 at a proton angle of 69.0°.

At small proton angles there is for the $l_n=1\mathrm{}$ proton groups a consistent correlation between the sign of the polarization and the relative orientation of the spin of the captured neutron and its orbital angular momentum.

• Received 17 December 1957

DOI:https://doi.org/10.1103/PhysRev.110.456