Microphotographic techniques have been used to obtain the range distribution of the charged particles resulting from the D - D reactions at center of mass angles of 40 degrees, 60 degrees, and 80 degrees for 10-Mev deuterons. At 80 degrees all of the groups of charged particles from the above reactions are clearly resolved. The differential D - D elastic scattering cross sections have been obtained for the same angles and for these angles the cross sections per unit solid angle in the center-of-mass system are in the ratios of 1.00:0.51:0.42, respectively. Only one group of protons is observed from the $\mathrm{D}(d,\mathrm{H}){\mathrm{H}}^3$ reaction, thus indicating that the ${\mathrm{H}}^3$ nucleus is not formed in an excited state for the energy region investigated when ${\mathrm{He}}^4$ is the compound nucleus.

• Received 6 June 1949

DOI:https://doi.org/10.1103/PhysRev.76.1283