Observation of parity nonconservation in the integrated. gamma. spectrum from (n,. gamma. ) reactions in Cl, Br, Cd, Sn, and La nuclei

A P-odd asymmetry has been observed in the emission of ..gamma.. rays upon the capture of polarized thermal neutrons by Cl, Br, and La nuclei. A circular polarization of the ..gamma.. rays has been observed during the capture of unpolarized neutrons by Cl, Br, Sn, and La nuclei.