【摘要】 在U形管声致发光装置的基础上建立了一套新型的声致发光装置——直管圆锥泡声致发光装置.利用此装置以有机溶液为液体介质得到了超强的发光脉冲并测量得到了其发光光谱.结果表明发光光谱为一从紫外光至可见光波长范围的连续谱,上面叠加有C2的d3Πg→d3Πu跃迁形成的五个序列谱带,分别对应于Δv=-2,Δv=-1,Δv=0,Δv=1和Δv=2;同时叠加有CN的B2Σ+→X2Σ+跃迁形成的3个序列谱带和CH的A2Δ→X2Π跃迁谱带.实验中测量得到了斯旺带光谱序列谱带清晰的振动结构,在此基础上,利用双原子分子光发射理论计算得到了C2分子的振动温度为5100±200K.最后,讨论了圆锥泡声致发光过程中的化学反应,证明了有机溶液声致发光中化学发光的存在.更多还原

【Abstract】 Based on the U-tube,one new type of sonoluminescence apparatus —the conical bubble sonoluminescence straight tube has been set up.Using the apparatus,the ultrabright cavitation luminescence was obtained and the spectra were measured.Results show that the spectra consist in a broad background ranging from the ultraviolet region 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 has also been measured.Specially,the vibrational structures of Swan bands could be resolved clearly.In addition,the achieved molecular vibrational temperature is estimated to be about 5100±200 K.Finally,the chemical reactions in the sonoluminescence are discussed,which shows the excitence of chemiluminescence in sonoluminescence from organic solution.更多还原