Geometric Optimization of a Neutron Detector for In-Flight Measurement of the Neutron Lifetime

A. W. Nelsen, E. G. Ballantyne, R. E. Calvert +4

The recent measurement of the lifetime of the free neutron using the beam method has an 8.7 s (4$\sigma$) discrepancy with UCN measurements. The goal of the BL3 experiment is to improve…