丙三醇溶液声致发光中的黑体辐射谱  

Blackbody Radiation of Cavitation Luminescence from Glycerin

作　　者：何寿杰[1] 哈静[2] 刘立芳[2] 王龙[3] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002 [2]河北农业大学理学院,河北保定071001 [3]中国科学院物理研究所,北京100080

出　　处：《光谱学与光谱分析》2010年第3期621-624,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20273077);河北大学校内青年基金项目(2005Q06)资助

摘　　要：利用U型管圆锥泡声致发光装置,测量到了丙三醇溶液中圆锥泡声致发光的光谱和光脉冲。结果表明,测量得到的发光光谱为光滑的连续谱,且与理论模拟得到的黑体辐射谱相吻合,拟合温度分布于2 600~3 500 K范围内。文章从空间和时间两方面分析了圆锥泡空化发光中存在黑体辐射的原因：较大的气泡体积（气泡塌缩半径为1.4 cm）与较长的发光时间（几十微秒）。另外,实验研究表明随着发光波长的增长,光脉冲宽度变宽,从而进一步证明了圆锥泡声致发光中的黑体辐射机制。最后,利用测量得到的发光光谱和脉冲计算得到了发光光强为0.18 J,远远高于其他方式得到的声致发光光强。An improved conical bubble sonoluminescence U-tube was built. Using this setup, the spectra and light pulses of conical bubble luminescence in glycerin were detected. Results show that the spectra are continuum, which are well fitted by blackbody radiation. The cavitational temperature ranging from 2 600 to 3 050 K was calculated from the fitted spectra. The reasons for the existence of blackbody radiation in conical bubble luminescence were discussed both from special and temporal sides. The value of radius of eavitational bubble is about 1.7 cm theoretically, which is greater than that of the bubble acoustically excited. The width of light pulses of cavitational bubble reached 40-60 ms, and this provided enough time for the blackbody radiation. In addition, the light pulses at different wavelength were measured, and results show that the width of light pulses increased with the raise of wavelength of spectra, which proved the mechanism of blackbody radiation. Finally, based on the spectra and light pulses, the intensity of luminescence was calculated to be about 0. 18 J.

关 键 词：声致发光 光脉冲 光谱 黑体辐射 光强 

分 类 号：O433.1[机械工程—光学工程] O427.4[理学—光学]