The parametric dependence of the output energies and efficiency for the Raman conversion of XeCl excimer laser radiation in Pb vapor was studied. Pulses at the Raman-shifted wavelength, with 120 mJ energy and 2 MW peak power, were obtained. Multi-peak structures of the waveforms of Raman-shifted pulses were observed; they could be attributed to the cooperative effects in Raman scattering.