It is well known that the gas bremsstrahlung produced by the electron and positron beams circulating in a storage ring is one of the main photon radiation source for this kind of machines. However, at high luminosity e+e- storage rings, another considerable photon source should be taken into account: the so called radiative Bhabha scattering or single beam-beam bremsstrahlung. According to the luminosity, to the residual gas pressure and to the length of the straight sections where e+e- beams are made to collide, the latter process can become as important as gas bremsstrahlung. The dose-rates due to the radiative Bhabha scattering have been evaluated in the case of the Main Rings of the DAPHNE Project, the e+e- PHI-factory presenctly under construction at the Frascati National Laboratories (Italy). A comparison is made with the espected dose-rates due to gas bremsstrahlung.
D et al. (Thu,) studied this question.