Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material
文献类型：期刊论文
| 作者 | Li, Xiao-long3,4; Li, Ya-ju3,4; Li, Song-ting1; Zhou, O-ji3,4; Chen, Liang-wen3,4; Meng, Ju2; Qian, Dong-bin3,4 ; Yang, Jie3,4; Zhang, Shao-feng3,4; Wu, Yong2
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| 刊名 | PHYSICAL REVIEW APPLIED
 |
| 出版日期 | 2021-08-10 |
| 卷号 | 16期号:2页码:9 |
| ISSN号 | 2331-7019 |
| DOI | 10.1103/PhysRevApplied.16.024017 |
| 通讯作者 | Qian, Dong-bin(qiandb@impcas.ac.cn) |
| 英文摘要 | Optical emission of plasma induced by a pulsed laser ablating the surface of a randomly packed granular (RPG) material in air is investigated experimentally, taking sieved copper microspheres with discrete diameters, d, ranging from 49 to 390 mu m as examples. We find a steplike phenomenon (also called a critical-like phenomenon) in the dependence of plasma emission on the grain size: when d is less than a critical size, only weak emissions are detected; however, when d exceeds the critical size, the emissions abruptly become at least 5 times stronger. Such a phenomenon can be explained by considering the RPG material as a non-Newtonian fluid with a yield stress and an effective viscosity. Specifically, in the range of the grain size above (below) the critical value, the RPG target has a yield stress larger (smaller) than the shock pressure imparted by the energetic processes of plasma generation and expansion, and thus, behaves like an elastic solid (a viscous fluid) to assist (impede) the formation of the plasma with high temperature and high density as an optical emission source for spectrochemical analysis. This work not only has significance in assessing a lower size limit for direct multielement analysis of RPG material using laser-induced breakdown spectroscopy (LIBS), but also shows that the mechanical characteristics of RPG material may be probed using LIBS. |
| WOS关键词 | INDUCED BREAKDOWN SPECTROSCOPY ; SHOCK-WAVE PLASMA ; EXCITED ATMOSPHERIC CO2-LASER ; ELEMENTAL ANALYSIS ; SENSITIVE ANALYSIS ; INSTRUMENT SUITE ; PRESSURE ; POWDERS ; SOIL ; GAS |
| 资助项目 | National Key RD Program[2017YFA0402300] ; NSFC program[11974359] ; NSFC program[U1632143] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000684257000002 |
| 出版者 | AMER PHYSICAL SOC |
| 资助机构 | National Key RD Program ; NSFC program |
| 源URL | [http://119.78.100.186/handle/113462/136641]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Qian, Dong-bin |
| 作者单位 | 1.Northwest Univ, Inst Photon & Photon Technol, Xian 710069, Peoples R China 2.Inst Appl Phys & Computat Math, Beijing 100000, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xiao-long,Li, Ya-ju,Li, Song-ting,et al. Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material[J]. PHYSICAL REVIEW APPLIED,2021,16(2):9. |
| APA | Li, Xiao-long.,Li, Ya-ju.,Li, Song-ting.,Zhou, O-ji.,Chen, Liang-wen.,...&Ma, Xin-wen.(2021).Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material.PHYSICAL REVIEW APPLIED,16(2),9. |
| MLA | Li, Xiao-long,et al."Steplike Behavior in Grain-Size-Dependent Optical Emission of Plasma Induced by Laser-Ablating Granular Material".PHYSICAL REVIEW APPLIED 16.2(2021):9. |
入库方式： OAI收割
来源：近代物理研究所
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