手性气体的二元混合物
Binary mixtures of chiral gases
摘要：
众所周知的手性分子佯谬的一个可能的解决方案是基于自发对称性破缺的思想。在低压下，分子在给定分子势的两个最小值之间离域，而在较高压力下，由于分子间偶极-偶极相互作用，分子变得局域在一个最小值中。这种相变的证据提供了在不同的压力下的氨和氘代氨的反转光谱的测量。特别地，在大于临界值的压力下，没有观察到反转线。这些数据很好地占了以前开发的模型，最近扩展到混合物。本文讨论了二元混合物临界压力随组分分数的变化。
英文摘要：
A possible solution of the well known paradox of chiral molecules is based on the idea of spontaneous symmetry breaking. At low pressure the molecules are delocalized between the two minima of a given molecular potential while at higher pressure they become localized in one minimum due to the intermolecular dipole-dipole interactions. Evidence for such a phase transition is provided by measurements of the inversion spectrum of ammonia and deuterated ammonia at different pressures. In particular, at pressure greater than a critical value no inversion line is observed. These data are well accounted for by a model previously developed and recently extended to mixtures. In the present paper, we discuss the variation of the critical pressure in binary mixtures as a function of the fractions of the constituents.
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