  Sonoluminescence is a phenomenon involving the transduction of sound into
light. The detailed mechanism as well as the energy-focusing potentials are not
yet fully explored and understood. So far only optical photons are observed,
while emissions in the ultra-violet range are only inferred. By doping the
fluorescent dye quinine into water with dilute sulphuric acid, the high energy
photons can be converted into the optical photons with slower decay constants.
These sonoluminescence and fluorescent emissions were observed in coincidence,
and the emitted signals of the two modes can be differentiated by their
respective timing profiles. Plans for using this technique as a diagnostic tool
to quantitatively study ultra-violet and other high energy emissions in
sonoluminescence are discussed.
