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Related Experiment Video

Updated: Jul 11, 2026

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

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Published on: April 11, 2014

Composition and its evolution inside a sonoluminescing bubble by line spectra.

Junfeng Xu¹, Weizhong Chen, Xinghua Xu

¹The Key Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, Nanjing 210093, China.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|October 13, 2007

Summary

This summary is machine-generated.

Single bubble sonoluminescence (SBSL) reveals bubble composition and spectral similarity to multibubble sonoluminescence (MBSL). Noble gases are crucial for line emissions, and mass exchange occurs within the bubble.

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Published on: February 14, 2014

Area of Science:

Acoustics
Physical Chemistry
Spectroscopy

Background:

Sonoluminescence (SL) involves light emission from collapsing bubbles.
Single bubble sonoluminescence (SBSL) and multibubble sonoluminescence (MBSL) share spectral similarities.
Noble gases are implicated in SL phenomena.

Purpose of the Study:

To investigate the composition of bubbles in stable and bright single bubble sonoluminescence (SBSL).
To compare the spectral characteristics of SBSL with multibubble sonoluminescence (MBSL).
To explore the role of noble gases and mass exchange in SBSL.

Main Methods:

Observation of line emissions (OH*, Na, Na-Ar*, Ar) in SBSL.
Spectral analysis comparing SBSL and MBSL.
Time-resolved spectroscopy to study mass exchange.
Experiments using sulfuric acid to test the argon rectification theory.

Main Results:

SBSL composition includes vapor, liquid droplets, and dissolved gas.
SBSL and MBSL exhibit identical spectra.
Noble gases are essential for observed line emissions in both SBSL and MBSL.
Significant mass exchange occurs within SBSL bubbles on timescales from milliseconds to seconds.
SBSL in sulfuric acid provides evidence for the argon rectification theory, though rectification is weak due to narrow parameter ranges.

Conclusions:

SBSL and MBSL share fundamental spectral properties, indicating similar underlying physical processes.
Bubble composition is complex, involving multiple phases.
Noble gases play a critical role in the emission mechanisms of sonoluminescence.
Mass transfer between the bubble interior and surrounding liquid is a significant aspect of SBSL.
The argon rectification theory is supported by SBSL experiments in sulfuric acid.