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首页> 外文期刊>The Journal of Chemical Physics >Brillouin spectra and vibrational-translational energy exchange in liquid acetonitrile
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Brillouin spectra and vibrational-translational energy exchange in liquid acetonitrile

机译：液体乙腈中的布里渊光谱和振动-平移能量交换

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摘要

Polarized light scattering experiments in the GHz frequency range (Rayleigh-Brillouin spectra) are reported for liquid acetonitrile. Hypersonic velocities and absorption coefficients have been measured as a function of temperature and of transferred wave vector. The plots of these quantities versus frequency show characteristic dispersion which is indicative of relaxation phenomena. The occurring relaxation has been interpreted as due to a thermal process in which the translational energy of molecules is transferred, during the collisions or through dipolar interactions, into internal degrees of freedom of low quanta vibrational motions. The quite strange behavior of the relaxation time with the temperature has been interpreted and compared with the behavior of the relaxation time in liquid chloroform. (C) 1998 American Institute of Physics. [References: 38]
机译：报道了液体乙腈在GHz频率范围内的偏振光散射实验（瑞利-布里渊光谱）。高超声速和吸收系数已作为温度和传递波矢量的函数进行了测量。这些数量与频率的关系曲线显示出特征色散，该色散表示松弛现象。发生的弛豫已被解释为是由于一个热过程，在该过程中，分子的平移能在碰撞过程中或通过偶极相互作用传递到低量子振动运动的内部自由度中。已经解释了弛豫时间随温度的相当奇怪的行为，并将其与液态氯仿中弛豫时间的行为进行了比较。 （C）1998美国物理研究所。 [参考：38]

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