Abstract:
Recent experiments have achieved the single bubble sonoluminescence (SBSL) in nondegassed water. Theoretical discussion of these new experiments is presented. First, the stability analysis of the radial bubble oscillations with respect to surface instabilities is given. It is found that the growth of unstable surface modes might be responsible for the experimentally observed oscillations in the SL emission. Second, the previously developed theoretical model is employed in order to explain these new experimental data for the SL radiation. This model is based on the production of the shock waves in a collapsing bubble. Furthermore, strong response of the intensity of the SL radiation on small changes of some of the experimental parameters is discussed. The agreement between the theory and the experiment is found to be very good, considering the complexity of the problem and a variety of physical and chemical processes involved. Finally, the methods for enhancing the effect of SL are discussed and the suggestions for further experimental and theoretical research presented. [Work partially supported by DOE.]