Two components of Na emission in sonoluminescence spectrum from surfactant aqueous solutions.

摘要: Abstract Sonoluminescence from sodium dodecyl sulfate (SDS) aqueous solutions exhibits Na emission. The spectrum of emission was measured as a function sonication time for total 30 min at an ultrasonic frequency 148 kHz. spectral line profiles changed with the time, suggesting that consists two components: broadened lines, which are shifted original D and unshifted narrow lines. intensity lines decreased greater rate than increasing time. This effect enhanced higher acoustic power. remained after 30 min. We propose these quenching effects caused by accumulation gases decomposed SDS molecules inside bubbles. CO 2 gas dependence in NaCl showed similar change to solutions, supported this proposition. easily affected foreign gases. results suggest components originate different environments around emitting species, although both them phase generation mechanisms discussed.