Tests of Time-Reversal Invariance in the ReactionsMg24+d⇄Mg25+p

No evidence for a violation of time-reversal invariance has been found in a study of the inverse reactions ${\mathrm{Mg}}^{24}+d\rightleftarrows {\mathrm{Mg}}^{25}+p$, using 10-MeV deuterons and 15-MeV protons. Relative differential cross sections for the two reactions agree to within an experimental standard deviation of 0.4%. This is tentatively interpreted as implying that the ratio of the $T$-odd to $T$-even reaction amplitudes is probably less than 0.4%.