Measurement of the $^{3}{\rm H}(d,\gamma)$/$^{3}{\rm H}(d,n)$ Branching Ratio at Low Energy

The branching ratio $^{3}{\rm H}(d,\gamma)^{5}{\rm He}$/$^{3}{\rm H}(d,n)\alpha$ has been measured using a 500-keV pulsed deuteron beam incident on a stopping titanium tritide target, producing a cross-section-weighted average energy of 196 keV. The time-of-flight technique has been used to distinguish the $\gamma$-rays from the neutrons in the bismuth germinate $\gamma$-ray detector. Two stilbene scintillators and an NE-213 scintillator have been used to detect the neutrons using both the pulse-shape discrimination and time-of-flight techniques. The branching ratio has been measured to be (6.9$\pm$1.6)$\times$10$^{-5}$.