Measurement of Pressure and Density Inside a Single Sonoluminescing Bubble

David J. Flannigan, Stephen D. Hopkins, Carlos G. Camara, Seth J. Putterman, and Kenneth S. Suslick
Phys. Rev. Lett. 96, 204301 – Published 22 May 2006

Abstract

The average pressure inside a sonoluminescing bubble in sulfuric acid has been determined by two independent techniques: (1) plasma diagnostics applied to Ar atom emission lines, and (2) light scattering measurements of bubble radius vs time. For dimly luminescing bubbles, both methods yield intracavity pressures 1500   bar. Upon stronger acoustic driving of the bubble, the sonoluminescence intensity increases 10 000-fold, spectral lines are no longer resolved, and radius vs time measurements yield internal pressures >3700   bar. Implications for a hot inner core are discussed.

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  • Received 17 August 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.204301

©2006 American Physical Society

Authors & Affiliations

David J. Flannigan1, Stephen D. Hopkins1, Carlos G. Camara2, Seth J. Putterman2, and Kenneth S. Suslick1,*

  • 1Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
  • 2Physics Department, University of California, Los Angeles, California 90095, USA

  • *Electronic address: ksuslick@uiuc.edu

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Issue

Vol. 96, Iss. 20 — 26 May 2006

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