Direct observations of single sonoluminescence pulses
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Previous reports have described experimental measurements and theoretical descriptions of sonoluminescence without clearly resolving the physical events that underlie this phenomenon. Although incomplete, these results have led to suggestions that sonoluminescence might be such an extreme process that it could serve as an unusual inertial confinement source of fusion neutrons. Such a possibility depends on physical details of individual sonoluminescence events such as the source temperature, diameter, and density. The present report describes attempts to measure the diameter and duration of single sonoluminescence flashes. In both cases the results were limited by the resolution of the instruments, giving diameters of the order of 3 ltm or less and durations of the order of 12 ps, or less.
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Abel, Gary R. (Monterey, California. Naval Postgraduate School, 1993-12);Sonoluminescence is the synchronous emissions of pulses of light that are observed to originate from a gas bubble trapped at the pressure antinode of a resonant sound field in a liquid. The duration of the pulse has been ...
Gaitan, D. Felipe; Atchley, Anthony A.; Lewia, S.D.; Carlson, J.T.; Maruyama, X.K.; Moran, Michael; Sweider, Darren (1996-07);A single gas bubble, acoustically levitated in a standing-wave field and oscillating under the action of that field, can emit pulses of blue-white light with duration less than 50 ps. Measurements of the spectrum of ...
Lewia, Stephen D. (Monterey, California. Naval Postgraduate School, 1992-12);The continuous emission of picosecond pulses of light has been observed to originate from a bubble trapped at the pressure antinode of a resonant sound field in water and in water/glycerin mixtures. The spectra of this ...