The cross-section ratio for 3H(d,γ)5He relative to 3H(d,α)n has been measured at an effective deuteron bombarding energy of 100 keV with a NaI pair spectrometer and a tritiated-titanium target. The ratio was determined to be (1.2±0.3)×10^-4 by comparing the spectra and count rates for 3H(d,γ)5He and 3H(d,α)n with 2H(3He,γ)5Li and 2H(3He,α)1H
