2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192431We use the experimental limit on the interference of M1 and E2 multipoles in the $γ$-decay of $^{57}$Fe to bound the time-reversal-violating parity-conserving $ρN N$ vertex. Our approach is a large-basis shell-model calculation of the interference. We find an upper limit on the parameter $\bar{g}_ρ$, the relative strength of the T-violating $ρN N$ vertex, of close to $10^{-2}$, a value similar to the best limits from other kinds of experiments.8 pages, RevTeX, 2 postscript figures included via uufilesNuclear TheoryHigh Energy Physics - Phenomenologytext