We report results of calculations of the parity-mixing observables in the capture of thermal neutrons by protons. The calculations are exact and employ the Reid soft-core potential and the conventional Cabibbo model potential to describe the strong and weak nucleon-nucleon interactions, respectively. The calculated photon circular polarization is -2×${10}^{-8\mathrm{}}$ which is two orders of magnitude less than the experimental value, but of the same sign.

NUCLEAR REACTIONS ${}_{}{}^1{}_{}{}^{}\mathrm{H}(n, \gamma )$; thermal neutrons, calculated circular polarization of $\gamma$, Reid soft-core potential, conventional Cabibbo parity violating potential.

• Received 9 September 1974

DOI:https://doi.org/10.1103/PhysRevC.11.349