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Related Experiment Videos

Line emission in single-bubble sonoluminescence.

J B Young1, J A Nelson, W Kang

  • 1James Franck Institute and Department of Physics, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637, USA.

Physical Review Letters
|April 6, 2001
PubMed
Summary

Single-bubble sonoluminescence (SBSL) mirrors multibubble sonoluminescence (MBSL) at low intensities, with a smooth transition controlled by acoustic pressure. Gas type and water temperature influence emission bands, revealing molecular emission

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Area of Science:

  • Acoustics and Photonics
  • Chemical Physics

Background:

  • Sonoluminescence (SL) is light emission from bubble collapse in liquids.
  • Single-bubble sonoluminescence (SBSL) and multibubble sonoluminescence (MBSL) are distinct phenomena.
  • The mechanisms driving SBSL and MBSL are not fully understood.

Purpose of the Study:

  • To investigate the relationship between SBSL and MBSL.
  • To determine factors influencing emission bands in sonoluminescence.
  • To explore the role of molecular emission in SBSL.

Main Methods:

  • Experimentally inducing SBSL in pure noble gases.
  • Varying acoustic pressure amplitude to control light intensity.
  • Analyzing emission band characteristics at different water temperatures and noble gas types.

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Main Results:

  • SBSL at low intensities exhibits emission bands similar to MBSL.
  • A smooth crossover between SBSL and MBSL behavior was observed by adjusting acoustic pressure.
  • The relative intensity of band emission is dependent on noble gas molecular weight and water temperature.

Conclusions:

  • A direct connection between SBSL and MBSL mechanisms is established.
  • Molecular emission plays a significant role in SBSL.
  • Acoustic pressure is a key parameter for controlling the transition between SBSL and MBSL regimes.