Abstract

Single Bubble Sonoluminescence (SBSL) represents a light-emitting effect from a bubble driven by ultrasound. In this work, SBSL phenomenon in potassium dihydrogen phosphate (KDP) solutions was studied. SBSL intensity in KDP solutions with respect to ultrasonic amplitude and frequency, concentration and temperature was measured and analyzed. Result shows that stable SBSL can be realized around 27.6 kHz. Meanwhile, it is found that the optimal driving frequencies and driving ultrasonic amplitudes of SBSL are substantially affected by the liquid temperature and concentration. SBSL in water was used as a reference, and comparison between results for KDP solutions and water shows different trends. In the measured spectra of SBSL in KDP solutions, the characteristic emission lines of ions were not found, which indicates that the ions in the solution did not or hardly participate in the sonoluminescence process.

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