Effects of alcohol addition on decay of sonoluminescence intensity

摘要： The observation of multibubble sonoluminescence (MBSL) during acoustic cavitational bubble collapse is known to be an appropriate approach to obtain physicochemical information about high-temperature and high-pressure sites generated under sonication. MBSL spectra observed when ultrasound is irradiated to Ar-saturated water can be classified into two categories; a continuum spectrum fraction over a wide range of wavelengths, and a clear peak located at around 310 nm, which is assignable to OH. So far, temporal changes in MBSL spectra have been reported in the presence of alcohols, which scavenge radicals generated in the sonochemical reaction [1]. The spectral changes are presumed to be due to gaseous products generated by the ultrasound decomposition of alcohols. The present study was carried out to investigate the correlation between spectral changes and the products of the sonochemical reaction including hydrogen peroxide and gaseous products from alcohols.