Bonner Prize Talk: Parity Violation in Compound-Nuclear Resonances

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

I will describe a series of experiments that observed large parity-violating asymmetries in the scattering of polarized neutrons from a number of nuclei. I will review statistical models of compound-nuclear resonances and the statistical interpretation of observables. I will present the results of the experiments and the analysis of the measured asymmetries to extract the strength function of the nuclear weak interaction. In A=232 10 of 10 measured asymmetries had a common sign, in contradiction to the predictions of statistical models. I will describe the interpretation of this phenomenon in terms of doorway states. I will summarize the status of theoretical efforts to obtain constraints on the couplings of the hadronic weak interaction from measured weak strength functions.

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