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The beam method obtains the beta decay lifetime of the free neutron from the specific activity of a slow neutron beam. The best previous result had an overall uncertainty of 3.4 s [Nico, et al. (2005)]. We present a plan for a phased experimental program that will improve the overall uncertainty using this method to 0.1 s or below and may help elucidate systematic effects that could explain the current...
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