中国物理B ›› 2008, Vol. 17 ›› Issue (8): 2984-2988.doi: 10.1088/1674-1056/17/8/037

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Comparison of Xe single bubble sonoluminescence in water and sulfuric acid

安 宇   

  1. Physics Department, Tsinghua University, Beijing 100084 and\\ Institute of Acoustics, Chinese Academy of Science, Beijing 100080, China
  • 收稿日期:2007-11-21 修回日期:2007-12-25 出版日期:2008-08-20 发布日期:2008-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10674081 and 10434070).

Comparison of Xe single bubble sonoluminescence in water and sulfuric acid

An Yu(安宇)   

  1. Physics Department, Tsinghua University, Beijing 100084 and Institute of Acoustics, Chinese Academy of Science, Beijing 100080, China
  • Received:2007-11-21 Revised:2007-12-25 Online:2008-08-20 Published:2008-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10674081 and 10434070).

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摘要： Using the equations of fluid mechanics with proper boundary conditions and taking account of the gas properties, we can numerically simulate the process of single bubble sonoluminescence, in which electron--neutral atom bremsstrahlung, electron--ion bremsstrahlung and recombination radiation, and the radiative attachment of electrons to atoms and molecules contribute to the light emission. The calculation can quantitatively or qualitatively interpret the experimental results. We find that the accumulated heat energy inside the compressed gas bubble is mostly consumed by the chemical reaction, therefore, the maximum degree of ionization inside Xe bubble in water is much lower than that in sulfuric acid, of which the vapour pressure is very low. In addition, in sulfuric acid much larger $p_{\rm a}$ and $R_{0}$ are allowed which makes the bubbles in it much brighter than that in water.

关键词: sonoluminescence, ionization, Xe bubble

Abstract: Using the equations of fluid mechanics with proper boundary conditions and taking account of the gas properties, we can numerically simulate the process of single bubble sonoluminescence, in which electron--neutral atom bremsstrahlung, electron--ion bremsstrahlung and recombination radiation, and the radiative attachment of electrons to atoms and molecules contribute to the light emission. The calculation can quantitatively or qualitatively interpret the experimental results. We find that the accumulated heat energy inside the compressed gas bubble is mostly consumed by the chemical reaction, therefore, the maximum degree of ionization inside Xe bubble in water is much lower than that in sulfuric acid, of which the vapour pressure is very low. In addition, in sulfuric acid much larger $p_{\rm a}$ and $R_{0}$ are allowed which makes the bubbles in it much brighter than that in water.

Key words: sonoluminescence, ionization, Xe bubble

中图分类号:  (Sonoluminescence, triboluminescence)

  • 78.60.Mq
61.20.-p (Structure of liquids)