Comment on ''Preequilibrium emission of hard photons in proton-nucleus reactions''

We show that the level-density prescription adopted by Oblozinsky in his preequilibrium hard-photon emission model leads to an incorrect division of the photoabsorption cross section among the accessible 2p-2h states, resulting in theoretical emission spectra that are underestimated by a factor 2.86. By using Fermi-gas rather than equidistant single-particle levels, a more accurate treatment of preequilibrium photon emission is obtained. We also note a close similarity between the photon emission rates predicted by the preequilibrium model and those that are obtained using bremsstrahlung theory