Date of Original Version
Tests are suggested to verify the hypothesis that thermal n−p capture proceeds via the transition 1S0→3S1 and that approximately 10% of the observed capture cross section is due to interaction effects. It is shown that measurements of the "γ polarization effect" using polarized neutrons and protons are capable of testing the predictions of the hypothesis to within 1%.
Malik, S. S. (1971). Possible Tests on the Verification of and Departure from "1S0→3S1 Radiative Transition in Thermal n−p Capture. Physical Review C, 5(5), 1807-1810. doi: 10.1103/PhysRevC.5.1807
Available at: http://dx.doi.org/10.1103/PhysRevC.5.1807