Comment on "A Quantum-Mechanical Equivalent-Photon Spectrum for Heavy   Ion Physics"
  We critically discuss the recently developed quantum-mechanical equivalent photon spectrum by Benesh et al. We point out that the key point, the strong absorption in heavy ion collisions, is not treated adequately. Conclusions drawn from such a spectrum are invalid. Equivalent photon spectra appropriate for heavy ions, have been given before in quantal as well as semiclassical versions and were found to be very satisfactory. 
G. Baur and C.A. Bertulani