ANALYSIS OF HARD 2-PHOTON CORRELATIONS MEASURED IN HEAVY-ION REACTIONS AT INTERMEDIATE ENERGIES - COMMENT

In a recent Rapid Communication [Phys. Rev. C 53, R553 (1996)] experim ental hard-photon correlations have been compared to Boltzmann-Uehling -Uhlenbeck (BUU) calculations. It is concluded that the data are best described with a single photon source at the beginning of the reaction and that photons coming from the late evolution of the system are jus t an artifact of the BUU approach. In this Comment we discuss some arg uments used by the authors and their conclusions, and demonstrate that BUU calculations, properly compared to data, are consistent with the previously established interpretation of hard photons being emitted fr om two distinct sources.