二苯甲酮的介电谱：β弛豫及其与模式耦合Cole-Cole峰的关系
Dielectric spectroscopy in benzophenone: The beta relaxation and its relation to the mode-coupling Cole-Cole peak
摘要：
我们报告了一个彻底的表征二苯甲酮的玻璃化动力学的宽带介电谱。我们检测到一个很明显的β松弛峰发展成一个多余的翅膀随着温度的升高。先前的分析结果，从光学克尔效应测量这种材料的模式耦合理论揭示了一个高频科尔-科尔峰。我们解决的问题，如果这种现象也可以解释的Johari-Goldstein β松弛，迄今无法解释的光谱特征固有的玻璃形成的物质，主要是在介电光谱中观察到的。我们的研究结果表明，根据目前的理论状况，这两个光谱特征似乎没有直接的关系。
英文摘要：
We report a thorough characterization of the glassy dynamics of benzophenone by broadband dielectric spectroscopy. We detect a well pronounced beta relaxation peak developing into an excess wing with increasing temperature. A previous analysis of results from Optical-Kerr-effect measurements on this material within the mode coupling theory revealed a high-frequency Cole-Cole peak. We address the question if this phenomenon also may explain the Johari-Goldstein beta relaxation, a so far unexplained spectral feature inherent to glass-forming matter, mainly observed in dielectric spectra. Our results demonstrate that according to the present status of theory, both spectral features seem not to be directly related.
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