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The multibubble sonoluminescence spectra of argon-saturated aqueous salt solutions of alkaline and alkaline earth metals exhibit an intense enhancement of atomic emission with respect to continuum emission with an increase in the hydrostatic pressure and decrease in the solution temperature. It is suggested that ion reduction and metal atom excitation occur in the incandescent liquid layer formed at the liquid/bubble interface during a time interval that is sufficiently short for diffusion. The layer volume and, therefore, the number of “trapped” metal ions increases with an increase in the finite temperature in the cavitation bubble, which is caused by external factors. 相似文献
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Optics and Spectroscopy - Using a counter for single photon correlations, the flashes of sonoluminescence and sonophotoluminescence of a 0.1 M aqueous solution of CeCl3 are separated by time. The... 相似文献
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Optics and Spectroscopy - The time-correlated photon counting technique using software is used to estimate the duration and succession of Na-line and continuum emission flashes upon irradiation of... 相似文献
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Multibubble sonoluminescence (MBSL) spectra of water from cavitation clouds were collected in the presence of different noble gases and at different acoustic intensities. Results show that at high acoustic intensity and with xenon as a dissolved gas the emission of the OH* radical becomes indiscernible from the continuum. These spectra resemble single-bubble sonoluminescence (SBSL) spectra. It is concluded that the source of emission in MBSL and SBSL can be the same, the difference in spectra is due to the higher temperature inside the bubble during SBSL. 相似文献
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