Optical spectra of water sonoluminescence

The sonolumiescence spectra of water saturated with noble gases were studied in a 220–500 nm interval. Total light power of sonoluminescence and the rate of hydrogen peroxide formation were measured. The number of photons emitted by OH^*-radicals was compared with the yield of OH-radicals. The intensity of the shortwave part of the spectra and the OH^*/OH ratio increased while the atomic weight of the gas increased.