HYDRODYNAMIC SOLUTIONS FOR A SONOLUMINESCING GAS BUBBLE

Analytic solutions for a sonoluminescing gas bubble have been obtained , which provide density, pressure, and temperature distributions for t he gas inside a bubble oscillating under an ultrasonic field. The solu tions show that sonoluminescence occurs due to the increase and subseq uent decrease in bubble wall acceleration which induces a thermal spik e. It also turns out that the number of electrons ionized, the ion spe cies, and the kinetic energy of the electrons affect crucially the spe ctrum of the light emitted.