观察原子在稀薄环境中的扩散

发布时间：2018-02-28 14:14

本文关键词： 稀薄气体扩散模型扩散过程中分散随机化星际空间斯图加特大学朗之万方程光阱计算机模拟 　出处：《物理》2017年08期 　论文类型：期刊论文

【摘要】：正观察原子在低温稀薄环境中的扩散,揭示出单次冲击对原子运动随机化所产生的影响。扩散描述宽范围的现象,例如大气中花粉和灰尘的传播,以及两种液体的混合等;扩散过程中,小颗粒在流体介质中分散开来。最近德国的一个研究小组已经能够跟踪在稀薄气体介质中扩散的单个原子。他们发现,仅仅单一的碰撞就足以把一个扩散原子,带入与介质中其他原子的平衡中。研究结果将有助于建立在稀薄环境中的扩散模型,如星际空间。
[Abstract]:The diffusion of atoms in low-temperature and rarefied environment is observed to reveal the effect of single shock on the randomization of atomic motion. Diffusion describes a wide range of phenomena such as the propagation of pollen and dust in the atmosphere and the mixing of two liquids. In the process of diffusion, small particles are dispersed in fluid media. Recently, a German research team was able to track a single atom diffused in a rarefied gas medium. They found that a single collision was enough to transfer a diffusion atom. The results will be helpful for the establishment of diffusion models in rarefied environments, such as interstellar space.
【作者单位】：中国科学院理化技术研究所;
【分类号】：O562

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