Measurement of the 3H(d,γ)/3H(d,n) Branching Ratio at Low Energy

The branching ratio 3H(d,γ)5He/3H(d,n)α 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 γ-rays from the neutrons in the bismuth germinate γ-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±1.6)x10-5.