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首页> 外文期刊>The Journal of Chemical Physics >Photoacoustic measurements of the vibrational relaxation of the selectively excited ozone (nu(3)) molecule in pure ozone and its binary mixtures with O-2, N-2, and noble gases
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Photoacoustic measurements of the vibrational relaxation of the selectively excited ozone (nu(3)) molecule in pure ozone and its binary mixtures with O-2, N-2, and noble gases

机译：选择性激发的臭氧（nu（3））分子在纯臭氧及其与O-2，N-2和稀有气体的二元混合物中的振动弛豫的光声测量

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The vibrational-translational relaxation time of the nu(3) state of ozone was deduced from the phase shift of the photoacoustic detector signal relative to the amplitude-modulated radiation of the CO2 laser used for excitation of O-3. A special photoacoustic cell with a third electrode is used to eliminate an instrumentation phase shift caused by inertia of the microphone membrane. A three-level kinetic model of O-3 is presented and used to fit the experimental and calculated phase shifts to determine the vibrational relaxation rate coefficients for pure O-3 and binary mixtures of O-3 with O-2, N-2, and noble gases He, Ne, Ar, Kr, and Xe. These results are presented and compared with experimental data obtained for O-3, O-3-O-2, and O-3-N-2 by fluorescence and double resonance techniques. Experimental data for nu(3) state relaxation in binary mixtures with all noble atoms have been obtained for the first time. These new results are compared with the simplest model of interaction. Thus we obtain a very good agreement for the decrease of constants with the increase of the colliding partner mass. (C) 2000 American Institute of Physics. [S0021-9606(00)00904-1]. [References: 28]
机译：从光声检测器信号相对于用于激发O-3的CO2激光器的调幅辐射的相移推导出臭氧的nu（3）状态的振动-平移弛豫时间。具有第三电极的特殊光声电池用于消除由传声器膜片的惯性引起的仪器相移。提出了O-3的三级动力学模型，并将其用于拟合实验和计算出的相移，以确定纯O-3以及O-3与O-2，N-2的二元混合物的振动弛豫速率系数。稀有气体He，Ne，Ar，Kr和Xe。介绍了这些结果，并与通过荧光和双共振技术获得的O-3，O-3-O-2和O-3-N-2的实验数据进行了比较。首次获得了具有所有贵族原子的二元混合物中nu（3）态弛豫的实验数据。将这些新结果与最简单的交互模型进行比较。因此，对于常数随碰撞伙伴质量的增加而减小，我们获得了很好的协议。 （C）2000美国物理研究所。 [S0021-9606（00）00904-1]。 [参考：28]

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