Single-bubble sonoluminescence from noble gas mixtures.

Light emission intensities from single-bubble sonoluminescence at room temperature, water dissolved with admixtures of pairs of noble gases, He-Ar and He-Xe, were measured as a function of mixing ratio to search for effects of species segregation occurring during the violent bubble collapse. The observed relative effect on the light emission intensity is surprisingly greater in He-Ar than in a He-Xe mixture.