The $\mathrm{T}\mathrm{}(d,n)\mathrm{}{}_{}{}^4{}_{}{}^{}\mathrm{He}$ neutron-source reaction has been reinvestigated utilizing the neutron time-of-flight techniques. This study was motivated by the lack of cross section data above 11 MeV, by large uncertainties in the 0° absolute cross sections, and by the need to improve the accuracy of both the absolute and relative cross-section data. Angular distributions were measured at $E_d=5.0,6.0,7.0,10.0,11.0,12.0,13.0,14.0,15.0,\mathrm{and} 15.7$ MeV using a neutron detector with a well-established relative efficiency. Absolute cross sections at 0° were obtained by normalization to precise charged-particle cross sections obtained for the reaction $\mathrm{D}(t,{}_{}{}^4{}_{}{}^{}\mathrm{He})n$. Below 10 MeV there is good agreement with earlier data.

• Received 2 October 1972

DOI:https://doi.org/10.1103/PhysRevC.7.882