Abstract

Measurements of parity violation in nuclei can determine properties of the basic weak nucleon–nucleon interaction, thereby testing electroweak theory and quark models of nucleons. Experiments observing parity violation in the photodisintegration of deuterium, in the scattering of protons from hydrogen, and in the emission of circularly polarized γ rays from 18F are described. A new technique for polarizing 3He is described, and the use of polarized 3He in measurements of parity and time reversal violation is presented. Finally, new directions in γ-ray spectroscopy are illustrated by the Sudbury Neutrino Observatory and new ultrahigh resolution bolometric detectors.

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