Does water vapor prevent upscaling sonoluminescence?

Ruediger Tögel, Bruno Gompf, Rainer Pecha, Detlef Lohse

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Experimental results for single-bubble sonoluminescence of air bubbles at very low frequency f = 7.1 kHz are presented: In contrast to the predictions of a recent model [S. Hilgenfeldt and D. Lohse, Phys. Rev. Lett. 82, 1036 (1999)], the bubbles are only as bright ( 104¿105 photons per pulse) and the pulses as long ( ¿150 ps) as at f = 20 kHz. We can theoretically account for this effect by incorporating water vapor into the model: During the rapid bubble collapse a large amount of water vapor is trapped inside the bubble, resulting in an increased heat capacity and hence lower temperatures, i.e., hindering upscaling. At this low frequency water vapor also dominates the light emission process.
Original languageEnglish
Pages (from-to)3165-3168
Number of pages4
JournalPhysical review letters
Issue number15
Publication statusPublished - 2000


  • IR-24784
  • METIS-129585


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