Effect of Noble Gas Doping in Single-Bubble Sonoluminescence

Hiller, Robert A.; Weninger, Keith; Putterman, Seth; Barber, Bradley P.

doi:10.1126/science.266.5183.248

Cited by 198 publications

(159 citation statements)

References 15 publications

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“…This has also been reported for SBSL from pure water. 3 Interestingly, the He spectrum also shows a broad peak centered at 280 nm. This is very different from He SBSL spectra in pure water in which the continuum shows no peak but instead continues to increase in intensity below 200 nm.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, spectra obtained from water, the fluid used most often for SBSL experiments, consist of featureless broadband emission extending from the near-UV to the near-IR. 3 These continuous spectra have led to predictions of extreme conditions within a single sonoluminescing bubble. Fitting of the featureless spectra to theoretical continuous emission mechanisms such as blackbody and bremsstrahlung emission have led to predictions of visible temperatures being upwards of 10 4 K with core temperatures being much higher.…”

Section: Introductionmentioning

confidence: 99%

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Molecular and atomic emission during single- bubble cavitation in concentrated sulfuric acid

Flannigan

Suslick

2005

Acoustics Research Letters Online

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular and atomic emission during single- bubble cavitation in concentrated sulfuric acid

Flannigan

Suslick

2005

Acoustics Research Letters Online

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“…Perhaps most surprisingly, Hiller et al (1994) found a sensitive dependence on the type of gas within the bubble: when the air dissolved in the liquid was replaced with pure nitrogen, the characteristically stable SBSL disappeared. With a gas composed of 80% nitrogen and 20% oxygen, there was still no sonoluminescence.…”

Section: Historical Overviewmentioning

confidence: 99%

“…Hiller et al (1992Hiller et al ( , 1994Hiller et al ( , 1998 measured the spectrum of a sonoluminescing air bubble in water and demonstrated that it increases toward the ultraviolet (Fig. 5).…”

Section: Historical Overviewmentioning

confidence: 99%

Single-bubble sonoluminescence

2002

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Single-bubble sonoluminescence occurs when an acoustically trapped and periodically driven gas bubble collapses so strongly that the energy focusing at collapse leads to light emission. Detailed experiments have demonstrated the unique properties of this system: the spectrum of the emitted light tends to peak in the ultraviolet and depends strongly on the type of gas dissolved in the liquid; small amounts of trace noble gases or other impurities can dramatically change the amount of light emission, which is also affected by small changes in other operating parameters (mainly forcing pressure, dissolved gas concentration, and liquid temperature). This article reviews experimental and theoretical efforts to understand this phenomenon. The currently available information favors a description of sonoluminescence caused by adiabatic heating of the bubble at collapse, leading to partial ionization of the gas inside the bubble and to thermal emission such as bremsstrahlung. After a brief historical review, the authors survey the major areas of research: Section II describes the classical theory of bubble dynamics, as developed by Rayleigh, Plesset, Prosperetti, and others, while Sec. III describes research on the gas dynamics inside the bubble. Shock waves inside the bubble do not seem to play a prominent role in the process. Section IV discusses the hydrodynamic and chemical stability of the bubble. Stable single-bubble sonoluminescence requires that the bubble be shape stable and diffusively stable, and, together with an energy focusing condition, this fixes the parameter space where light emission occurs. Section V describes experiments and models addressing the origin of the light emission. The final section presents an overview of what is known, and outlines some directions for future research. CONTENTS

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“…[1][2][3][4][5][6][7][8] Here, P a is the forcing pressure amplitude and /2 the frequency of the forcing field. This phenomenon is called single bubble sonoluminescence ͑SL͒.…”

Section: Introduction a The Phenomenonmentioning

confidence: 99%

Phase diagrams for sonoluminescing bubbles

Lohse

Brenner

Hilgenfeldt

1996

The Journal of the Acoustical Society of America

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Sound driven gas bubbles in water can emit light pulses. This phenomenon is called sonoluminescence ͑SL͒. Two different phases of single bubble SL have been proposed: diffusively stable and diffusively unstable SL. We present phase diagrams in the gas concentration versus forcing pressure state space and also in the ambient radius versus gas concentration and versus forcing pressure state spaces. These phase diagrams are based on the thresholds for energy focusing in the bubble and two kinds of instabilities, namely ͑i͒ shape instabilities and ͑ii͒ diffusive instabilities. Stable SL only occurs in a tiny parameter window of large forcing pressure amplitude P a ϳ1.2-1.5 atm and low gas concentration of less than 0.4% of the saturation. The upper concentration threshold becomes smaller with increased forcing. Our results quantitatively agree with experimental results of Putterman's UCLA group on argon, but not on air. However, air bubbles and other gas mixtures can also successfully be treated in this approach if in addition ͑iii͒ chemical instabilities are considered. All statements are based on the Rayleigh-Plesset ODE approximation of the bubble dynamics, extended in an adiabatic approximation to include mass diffusion effects. This approximation is the only way to explore considerable portions of parameter space, as solving the full PDEs is numerically too expensive. Therefore, we checked the adiabatic approximation by comparison with the full numerical solution of the advection diffusion PDE and find good agreement.

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Effect of Noble Gas Doping in Single-Bubble Sonoluminescence

Cited by 198 publications

References 15 publications

Molecular and atomic emission during single- bubble cavitation in concentrated sulfuric acid

Molecular and atomic emission during single- bubble cavitation in concentrated sulfuric acid

Single-bubble sonoluminescence

Phase diagrams for sonoluminescing bubbles

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