The Treiman-Yang criterion to test the dominance of the pole graph has been applied to the reaction $\mathrm{H}\mathrm{}(d,2p)n$ in the quasifree condition and at a deuteron energy of 20 MeV. The distribution obtained is not constant, thus indicating the need for further graphs.

• Received 2 June 1971

DOI:https://doi.org/10.1103/PhysRevLett.27.1661