  We have simulated large-amplitude standing waves on an Abelian-Higgs cosmic
string in classical lattice field theory. The radiation rate falls
exponentially with wavelength, as one would expect from the field profile
around a gauge string. Our results agree with those of Shellard and Moore, but
not those of Vincent, Antunes, and Hindmarsh. The radiation rate falls too
rapidly to sustain a scaling solution via direct radiation of particles from
string length. There is thus reason to doubt claims of strong constraints on
cosmic string theories from cosmic ray observations.
