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Metabasin transitions are Johari-Goldstein relaxation events

机译:Metabasin转型是Johari-Goldstein放松活动

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We show that by representing quasi-elastic and inelastic neutron scattering from propylene carbonate (PC) with an explicitly heterogeneous model, we recover signatures of two distinct localized modes in addition to diffusive motion. The intermediate scattering function provides access to the time-dependence of these two localized dynamic processes, and they appear to correspond to transitions between inherent states and between metabasins on a potential energy landscape. By fitting the full q-dependence of inelastic scattering, we confirm that the Johari-Goldstein (beta(JG)) relaxation in PC is indistinguishable from metabasin transitions.
机译:我们表明,通过用明确的异质模型代表从碳酸亚丙酯(PC)的准弹性和无弹性中子散射,除了扩散运动之外,我们还恢复两个不同局部模式的签名。 中间散射函数提供对这两个本地化动态过程的时间依赖性的访问,并且它们似乎对应于固有状态之间的转换以及潜在能量景观上的代购。 通过拟合无弹性散射的完整Q依赖性,我们确认在PC中的弛豫与毕达格拉辛过渡都无法区分。

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