An experimental test for parity conservation in the strong nuclear reaction $\mathrm{T}(d, n){\mathrm{He}}^4$ has been made using an incident accelerated beam of polarized deuterons. The deuterons, incident with 140-keV energy on a thick target of tritiated titanium, were vector-polarized transverse to the beam direction. The experiment measured the ratio in numbers of neutrons emitted parallel and antiparallel to the direction of the initial polarization vector, using opposed neutron counters. Periodic reversal of the polarization vector was used to eliminate instrumental asymmetries. The magnitude of the real part of the relative parity-violating amplitude, $\left|\mathrm{Re}\mathfrak{F}\right|$, was found to be $\stackrel{\mathrm{\sim }}{<}$3.8×${10}^{-3\mathrm{}}$, consistent with the conservation of parity.

• Received 29 December 1967

DOI:https://doi.org/10.1103/PhysRev.174.1200