Abstract
Recently two papers have been published which contain results on the branching ratio of the two D-D reactions at variance with those of earlier workers. In this note it is suggested that this disagreement is due to the acceptance by the latter of incorrect values for the angular asymmetries of the reactions. On this assumption the experimental results have been recalculated using more recent data on the angular distribution, and it is found that the corrected values are in agreement with those of the more recently published results; that is, the 90° c.m. branching ratio. σD(dn)3He/σ-D(dp)3H, does not vary with deuteron energy, but the ratio of the total cross sections rises from 1·01 at 14 kev to 1·20 at 466 kev deuteron energy.