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temperatures far beyond this could be reached [9, 101, and there has even been speculations that nuclear fusion could be obtained by sonoluminescence [ll, 12]! In this article we 1 FrrsWnw demonstrate experimentally that this is very improbable. C A m l AbstractWe have performed an experiment on sonoluminescence in liquid heavy water. We have vefied that sonoluminescence takes place with air bubbles as well as with D, bubbles in heavy water (98.5% D,O). No radioactivity originating from the phenomenon has been observed.

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