Improvements in the experimental and theoretical input to evaluation of the phase-space factor for beta-decay of the free neutron prompt its re-evaluation after an interval of 16 years. We find: f= 1.68857 ± 0.00008 and fR = 1.71517 ± 0.00009 without and with outer radiative correction, respectively. © 1998 Elsevier Science B.V. All rights reserved.
Wilkinson, D. H. (1998). Phase space for neutron beta-decay: An update. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 404(2–3), 305–310. https://doi.org/10.1016/S0168-9002(97)01153-4