New determination of the deuteron binding energy and the neutron mass

A new value for the deuteron binding energy of B(d)=2.388 176 8(24)×10^-3 u is reported based on an absolute wavelength determination of the 2.2-MeV n-p capture γ ray. Derived values of the n-H and n-p mass differences are also given. We also derive M_n=1.008 664 919(14) u. We note that the uncertainties in the neutron-mass data are now dominated by uncertainties arising from mass spectroscopy.