Abstract
The phenomenon of luminescence under the action of ultrasound (sonoluminescence, SL) was studied in a liquid exposed to the field of a high-frequency (HF, 880 kHz) focusing radiator with simultaneous or preliminary action of a low-frequency (LF, 19.9 kHz) ultrasound on the sample. It is shown that a nonadditive increase in the SL intensity takes place for simultaneously operating radiators and is observed for a long time (up to several hours) after switching off the LF source. This is evidence of a long-term aftereffect of the LF ultrasound on the magnitude of SL induced by the HF oscillations. The possible mechanisms of the observed effect are discussed.
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 27, No. 12, 2001, pp. 15–22.
Original Russian Text Copyright © 2001 by Dezhkunov.
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Dezhkunov, N.V. Sonoluminescence generated by the interaction of two ultrasonic fields with strongly different frequencies. Tech. Phys. Lett. 27, 491–494 (2001). https://doi.org/10.1134/1.1383835
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DOI: https://doi.org/10.1134/1.1383835