Double resonance spectra have been obtained for nitrogen and benzene molecules in the low density region of a molecular beam by use of stimulated Raman pumping followed by ionization probing. For N 2 the photoionization step was via a 2ϩ2 resonantly enhanced multiphoton ionization process using the a 1 ⌸ g (vϭ2)←X 1 ⌺ g (vϭ1) two-photon resonance. The detection limit is 10 3 -10 4 times lower than for the direct optical measurement of a stimulated Raman signal. For benzene, a more efficient 1ϩ1 ionization step permitted measurements at state densities less than 10 10 cm Ϫ3 and the Raman step yielded linewidths of 30 MHz for the Q-branch lines of the weak Raman active 16 fundamental.