Identification of Single Particle by Observing Dynamic Motions Caused by Magnetic Volume Force.

提出了一种基于磁体积力驱动的小颗粒材料识别新方法。通过将粒子的磁化率测量值与公布的值进行比较，可以确定粒子的材料。固体材料通常是由具有不同元素组成和非均质起源的晶粒组成的集合。在研究这类材料的初始阶段，重要的是提取和识别系综中包含的单个粒子的材料。这种方法应是非破坏性的，易于操作。目前在亚毫米级抗磁颗粒上取得的成果，对于实现构成原始材料的微米级颗粒的提取和鉴定具有重要意义。所描述的技术在寻找尚未确定的新型前太阳颗粒方面很有用。

A new method to identify the material of a small grain is proposed which is driven by magnetic volume force. By comparing the measured susceptibility of a particle by their published values, material of the particle is identified. Solid materials are generally obtained as an ensemble of grains with different elemental composition with heterogeneous origins. At an initial stage of investigating this type of material, it is important to extract and identify the material of individual particles included in the ensemble. Such method should be non-destructive and easily performed.. The present results achieved on sub-millimetre-sized diamagnetic grain have a large significance as a step to realize the extraction and identification of micron-sized grains that compose the primitive materials. The technique described is useful in the search for new types of pre-solar grains that are not identified as yet.