Rapid Brillouin Scattering Measurement of the Fast Relaxation Process in a Glass-Forming Intermediate Liquid
Rapid Brillouin Scattering Measurement of the Fast Relaxation Process in a Glass-Forming Intermediate Liquid
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玻璃形成中间液体中快速弛豫过程的快速布里渊散射测量
DOI：
10.1143/jjap.37.2812
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发表时间：
1998
影响因子：
1.5
通讯作者：
S. Itoh
中科院分区：
文献类型：
--
作者：
G. Matsui;S. Kojima;S. Itoh
采用高灵敏度的电荷耦合器件（CCD）探测器和角色散型法布里-珀罗干涉仪，将快速布里渊散射方法应用于氘代乙二醇-d4的千兆赫兹动力学研究。温度的变化进行了测量上的冷却在一个恒定的速率为1 K/min。得到的弛豫频率被发现遵守Arkenius定律的活化能~4.5千卡/摩尔，这对应于势垒的旋转运动的烷基基团与周围的分子相互作用。讨论了这种微观图像与模式耦合理论预测的笼效应的关系。
The rapid Brillouin scattering method was applied to the giga Hertz dynamics of the deuterated ethylene glycol-d4 by the combination of a highly sensitive charge coupled device(CCD) detector and an angular dispersion type Fabry-Perot interferometer. The temperature variation was measured on cooling at a constant rate of 1 K/min. The obtained relaxation frequency was found to obey the Arrhenius law with the activation energy ~4.5 kcal/mol, which corresponds to the potential barrier for the rotational motion of an alkyl group which interacts with the surrounding molecules. This microscopic picture was discussed in relation with the cage effect predicted by the mode coupling theory.