Abstract
Phosphoric acid was used to generate single bubble sonoluminescence (SBSL). The time history (especially time width) of the bubble emission intensity was acquired by a streak camera. Since the single emission of SBSL was very dim, the time width was estimated by accumulating the multiple emissions of SBSL. As a result, the emission time width of SBSL was estimated as 90- 680 ps. The emission time increases with increasing the concentration of phosphoric acid. And, when the any gas dissolved in liquid, the emission time also increases with increasing the ionization tendency.
