Abstract submitted to the
         XXXth International Conference on High Energy Physics
                July 27 - August 2, 2000, Osaka, Japan
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             Prompt photon measurements in photoproduction at HERA

                    
                               ZEUS Collaboration





                                    Abstract



    The production of prompt photons has been measured with the ZEUS
detector at HERA using an integrated luminosity of 37 pb-1.  Inclusive
cross sections as a function of photon pseudorapidity and transverse
energy are compared with leading-order Monte Carlo models and with
parton-level NLO QCD calculations. A study of the intrinsic parton
transverse momentum, k_T, in the proton has been performed using the
kinematical properties of events with a measured jet as well as a
prompt photon. The results are compared with earlier high-energy
proton-scattering measurements which had suggested unexpectedly high
values of parton k_T in the proton.