A Measurement of the Neutron Beta-Asymmetry Using Ultra-Cold Neutrons Produced in a Superthermal Solid Deuterium Source

North Carolina State University, Raleigh NC

Investigators

Abstract

This award will support a research effort aimed at measuring the angular correlation between neutron spin and the emission direction of the electron following beta decay of the neutron. The experiment will utilize ultra-cold neutrons at the Los Alamos Neutron Science Center. The goal is ultimately to provide an order-of-magnitude in the precision to which this asymmetry is known. This measurment, coupled with ongoing measurements of the neutron lifetime, can provide sensitive tests of the electroweak standard model, as well as improved values of the weak axial form factor of the nucleon. The research effort contains an exceptionally diverse collection of nuclear and atomic experimental techniques, at a scale where a Ph.D. student can have a substantial impact upon the course of the research.