The resonance Raman spectra of uranyl nitrate in dimethyl sulfoxide (DMSO) were measured at room temperature, with the use of ten output lines (528.7, 514.5, 501.7, 496.5, 488.0, 476.5, 472.7, 465.8, 457.9, and 454.5 nm) of an argon-ion laser. The excitation profile of the resonance Raman effect has been obtained by plotting the relative intensities of the uranyl symmetric stretching vibration at 835 cm<sup>-1</sup> against the laser exciting wavelengths. It has been found that the observed excitation profile of the uranyl symmetric stretching vibration resembles the vibronic structure of the electronic absorption spectrum. Also, the excitation profile obtained is briefly discussed in relation to the theory developed by J. Tang and A. C. Albrecht.

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