[en] The effects of intrabeam scattering on the beam dimensions and energy spread of a 100 GeV/amu gold beam are estimated. After 10 hours, growth of the transverse emittance is about a factor of three, with a similar growth in momentum spread. These findings are in agreement with earlier results of Parzen. Sensitivity of the results to the initial beam conditions is explored. In addition, calculations have been carried out for the case of high frequency (214 MHz) RF system. In this case the growth is more severe, giving a fivefold increase in transverse emittance. To ensure that the momentum spread after 10 hours does not exceed the RF momentum acceptance, a voltage in excess of 32 MV would be needed. 5 refs., 4 figs., 3 tabs