CAJ | 학술논문

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卢致发光光强.
이용U형관원추포성치발광장치,측량도료병삼순용액중원추포성치발광적광보화광맥충.결과표명,측량득도적발광광보위광활적련속보,차여이론모의득도적흑체복사보상문합,의합온도분포우2 600～3 500 K범위내.문장종공간화시간량방면분석료원추포공화발광중존재흑체복사적원인:교대적기포체적(기포탑축반경위1.4 cm)여교장적발광시간(궤십미초).령외,실험연구표명수착발광파장적증장,광맥충관도변관,종이진일보증명료원추포성치발광중적흑체복사궤제.최후,이용측량득도적발광광보화맥충계산득도료발광광강위0.18 J,원원고우기타방식득도적로치발광광강.
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 cavitational 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.