Radiative collisions and the sonoluminescence continua

Computer Science – Sound

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Sound Waves, Sonoluminescence, X-Ray Beams And X-Ray Optics

Scientific paper

Current views concerning the light emitting processes of sonoluminescence (SL) vary widely, even where certain spectroscopic facts seem to be well established. In search of the actual light emitting processes of sonoluminescence, we consider a variety of neutral-neutral and electron-neutral collision processes that take place under SL conditions. Such spectra are computed for comparison with the observed SL spectra. Calculated electron-atom bremsstrahlung spectra and measured profiles of SL of the rare gases are remarkably consistent with regard to both, spectral shape and absolute intensity-more so than the spectra of alternative collisional systems, e.g., pairs of neutral atoms or molecules. If indeed electron-atom bremsstrahlung were the principal emission process of SL of the rare gases, a number of puzzling observations could find rather natural explanations.

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