Novel States of Condensed Matter Generated in Supersonic Flow

这项研究是实验物理化学的一部分， 程序，利用电子衍射技术测量 液滴结构和动力学以及新的低密度流体 温度结晶相。 这些实验与 模型计算将阐明凝聚的性质 相组成的高度过冷微滴和新的低 温度结晶相。 在这些独特的数据中获得的数据 实验将被建模者用来验证他们的 理论结构，并提出新的液体模型 以及由少量分子单元组成的固体。 过冷液体的电子衍射花样 微滴和新的低温晶体相，形成 超音速汽相均质成核 流量，将被观察到。 获得的数据将增强 分子团簇的成核和生长的知识， 将为当前的理论提供严格的新测试， 分子液体 通过将实验结果与 蒙特卡罗模拟，更真实的表示， 多原子分子之间将产生相互作用。 在 液体是最不为人所知的 物质的形式，这种新的方法可以预期产生 新的重要见解。 另一个要解决的现象是 成核 控制团簇形态的能力 并在几微秒内研究它们的结构 形成将提供有用的数据的基础 理解成核的能量学和动力学。

This research, part of the Experimental Physical Chemistry Program, utilizes electron diffraction techniques to measure the structure and dynamics of liquid droplets and new low temperature crystal phases. These experiments coupled with model calculations will elucidate the nature of condensed phases consisting of highly supercooled microdrops and new low temperature crystal phases. The data obtained in these unique experiments will be used by modellers to both verify their theoretical constructs and to suggest new models for liquids and solids consisting of small numbers of molecular units. The electron diffraction patterns of supercooled liquid microdrops and new low temperature crystal phases, formed by homogeneous nucleation from the vapor phase in supersonic flows, will be observed. The data obtained will enhance knowledge of nucleation and growth of molecular clusters and will supply stringent new tests of current theories of molecular liquids. By coupling the experimental results with Monte Carlo simulations, more realistic representations of the interactions between polyatomic molecules will be made. In view of the fact that liquids are the least understood common form of matter, this fresh approach can be expected to yield new significant insights. The other phenomenon be addressed is nucleation. The ability to control the form of clusters nucleated and to study their structure within microseconds of formation will be provide useful data for the basic understanding of the energetics and dynamics of nucleation.