Accurate differential cross sections have been measured for the reactions ${}_{}{}^2{}_{}{}^{}\mathrm{H}{(d,{}_{}{}^3{}_{}{}^{}\mathrm{He})}_n$ at 12.305 MeV, for ${}_{}{}^3{}_{}{}^{}\mathrm{H}{(p,{}_{}{}^3{}_{}{}^{}\mathrm{He})}_n$ at 13.600 MeV, and ${}_{}{}^2{}_{}{}^{}\mathrm{H}{(t,{}_{}{}^4{}_{}{}^{}\mathrm{He})}_n$ at 20.000 MeV. The relative error for most of the data is on the order of 1% and the scale error is less than 1%. The data are used to give absolute normalizations to the measured neutron spectra from these reactions and will be useful in the analysis of mass-4 and mass-5 systems.

[NUCLEAR REACTIONS ${}_{}{}^2{}_{}{}^{}\mathrm{H}(d,{}_{}{}^3{}_{}{}^{}\mathrm{He})$, $E=12.305\mathrm{}$ MeV, $\theta (\mathrm{c}.\mathrm{m}.\mathrm{})=24-{96}^{\circ }$; ${}_{}{}^3{}_{}{}^{}\mathrm{H}(p,{}_{}{}^3{}_{}{}^{}\mathrm{He})$, $E=13.600\mathrm{}$ MeV, $\theta (\mathrm{c}.\mathrm{m}.\mathrm{})=25-{103}^{\circ }$; ${}_{}{}^2{}_{}{}^{}\mathrm{H}(t,{}_{}{}^4{}_{}{}^{}\mathrm{He})$, $E=20.000\mathrm{}$ MeV, $\theta (\mathrm{c}.\mathrm{m}.\mathrm{})=36-{104}^{\circ }$; $\Delta \theta =\pm {0.03}^{\circ }$, measured differential cross sections $\sigma \left(\theta \right)$; $\Delta \sigma =1\%$.]

• Received 15 December 1976

DOI:https://doi.org/10.1103/PhysRevC.16.15