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Published December 30, 2009 | Published
Book Section - Chapter Open

Measuring Neutron Beta Decay "A" Parameter Using Ultracold Neutrons

Abstract

The UCNA experiment is designed to measure the neutron decay beta asymmetry (the "A" parameter) to very high precision (<0.5%), using the ultracold neutron (UCN) source at the Los Alamos National Lab. After a successful commissioning run in 2007, data were taken in 2008 which will lead to a 1% measurement of A. In this talk, I will discuss major improvements we made in 2008, and report the status of data analysis.

Additional Information

© 2009 American Institute of Physics. Published online 30 December 2009. The author would like to acknowledge the contributions of the members of the UCNA collaboration. The UCNA experiment is supported in part by the Department of Energy, National Science Foundation, and Los Alamos National Laboratory LDRD.

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