The Light Pulses and Spectra of Straight Tube Conical Bubble Sonoluminescence in Glycol
HE Shou-jie1, HA Jing2, DONG Li-fang1, LIU Zhi-qiang1, WANG Long3
1. College of Physics Science and Technology, Hebei University, Baoding 071002, China 2. Institute of Science, Agricultural University of Hebei, Baoding 071001, China 3. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
Abstract：Based on the U-tube, a new type of sonoluminescence apparatus-conical bubble sonoluminescence straight tube apparatus was set up, and the structures and operations were described detailedly. Using the apparatus, the ultrabright cavitation luminescence was obtained in glycol solution. The light pulses of conical bubble sonoluminescence were detected, results show the half width is about 80 μs that is much longer than the results by ultrasound, which should be caused by the fact that the conical bubble can obtain more energy from the flow than the bubbles from the ultrasound. The spectra consist in a broad background ranging from the ultraviolet regioo to the visible region, on which five clear sequences of Swan bands and three sequences of B2Σ+→X2Σ+ transition of CN are superimposed. A band assigned to the A2Δ→X2Π transition of CH was also measured. Specially, the vibrational structures of Swan bands can be resolved. Finally, the achieved molecular vibrational temperature of C2 is estimated to be about (4 200±200) K.
Key words：Sonoluminescence;Light pulses;Spectra;Swan band;Vibrational temperature
何寿杰1,哈静2,董丽芳1,刘志强1,王龙3. 乙二醇溶液中直管圆锥泡声致发光光脉冲和光谱[J]. 光谱学与光谱分析, 2008, 28(11): 2507-2510.
HE Shou-jie1, HA Jing2, DONG Li-fang1, LIU Zhi-qiang1, WANG Long3. The Light Pulses and Spectra of Straight Tube Conical Bubble Sonoluminescence in Glycol. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(11): 2507-2510.
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