Choi Pak-Kon, Takumori Keisuke, Lee Hyang-Bok
Department of Physics, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Japan.
Department of Physics, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Japan.
Ultrason Sonochem. 2017 Sep;38:154-160. doi: 10.1016/j.ultsonch.2017.03.015. Epub 2017 Mar 9.
Na emission in single-bubble sonoluminescence (SBSL) was observed from 0.1mM sodium dodecyl sulfate (SDS) solution containing a dissolved noble gas at a low acoustic pressure, at which a continuous spectral component was negligible. High-speed shadowgraph movies were captured at a frame rate of 30,000fps, which indicated that bubble dancing is responsible for the Na emission. The measured bubble path length was well correlated with the Na intensity. The disintegration of a daughter bubble followed by immediate coalescence was frequently observed, which may have been the cause of the bubble dancing. A comparison of the Na spectra obtained in SBSL and multibubble SL showed that the conditions under which Na emission is generated are twofold. A narrow component was observed in the Na spectrum in SBSL, while narrow and broad components were observed in MBSL.
在含有溶解稀有气体的0.1mM十二烷基硫酸钠（SDS）溶液中，于低声压下观察到单泡声致发光（SBSL）中的钠发射，此时连续光谱成分可忽略不计。以30000fps的帧率拍摄高速阴影图电影，结果表明气泡跳动是钠发射的原因。测得的气泡路径长度与钠强度有良好的相关性。经常观察到子气泡破裂后立即合并的情况，这可能是气泡跳动的原因。对SBSL和多泡声致发光中获得的钠光谱进行比较表明，产生钠发射的条件有两个。在SBSL的钠光谱中观察到一个窄成分，而在多泡声致发光（MBSL）中观察到窄和宽两个成分。
