Thomas J. Matula
William B. McNamara, III
Pierre D. Mourad
Ron A. Roy
Kenneth S. Suslick
Appl. Phys. Lab., Univ. of Washington, Seattle, WA 98195
Univ. of Illinois, Urbana, IL 61801
Recent advances in the use of single bubble cavitation [D. F. Gaitan et al., J. Acoust. Soc. Am. 91, 3166 (1992)] have made it possible to examine both the temporal and spectral characteristics of sonoluminescence [B. P. Barber et al., J. Acoust. Soc. Am. 91, 3061 (1992)]. Direct comparison of the spectra of single-bubble sonoluminescence to multibubble sonoluminescence has proved difficult, however, due to differences in experimental conditions. Examination has begun of both single-bubble and multibubble sonoluminescence spectra of various aqueous solutions under closely similar conditions, where, in a systematic way, a variety of dissolved gases, volatile organic liquids, and involatile inorganic salts have been introduced. Qualitative comparisons of these spectra will be discussed. [Work supported by ONR and NSF.]