Abstract
Parity non-conservation was studied for seventeen states in 239U by measuring the helicity dependence of the p-wave resonance cross section for epithermal neutrons scattered from 238U. The root-mean-squared parity-violating matrix element for the mixing of p-wave and s-wave states was determined to be M = 0.58+0.50−0.25meV. This corresponds to a parity-violating spreading width of ΓPV = 1.0 × 10−7 eV. Under plausible assumptions this gives a value of 4 × 10−7 for αp, the ratio of strengths of the P-odd and P-even effective nucleon-nucleon interactions. The application of these techniques in studies of Time Reversal Symmetry is discussed.
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