Parity Violation in Neutron-CaptureγRays

Abstract
We have measured the circular polarization of γ rays from thermal neutron capture in Cd113 and find a Pγ=(6.0±1.5)×10−4 for the combined 8.51- and 9.04-MeV transitions. This value was measured using a transmission Compton polarimeter and pulse-counting technique. The value confirms the existence of parity-nonconserving terms in the internucleon force.