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Accurate Measurement of Raman Depolarization Ratio in Gaseous CO2
Yu-juan Jin1, Yuan-qin Yu*1, Yu-xi Wang2, Ke Lin2, Xiao-guo Zhou2, Shi-lin Liu2
1.School of Physics and Material Science, Anhui University, Hefei 230039, China;2.Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
Abstract:
The Raman depolarization ratios of gaseous CO2 in the spectral range of 1240-1430 cm-1 are determined with a sensitive photoacoustic Raman spectroscopy, and more accurate data compared to the literature results are presented. The precision of the obtained depolarization ratio is achieved by measuring and fitting the dependence of the PARS signal intensity on the cross angle between the polarizations of two incident laser beams.
Key words:  Depolarization ratio, Accurate measurement, Photoacoustic Raman spec-troscopy, Global fitting
FundProject:
气相二氧化碳分子拉曼退偏比的准确测量
靳玉娟1, 喻远琴*1, 王钰熙2, 林珂2, 周晓国2, 刘世林2
1.安徽大学物理与材料科学学院,合肥 230039;2.中国科学技术大学合肥微尺度物质科学国家实验室,化学物理系,合肥 230026
摘要:
利用灵敏的光声拉曼光谱技术对气相二氧化碳分子在1240~1430 cm-1振动光谱的拉曼退偏比进行了测量. 通过测量并拟合光声拉曼信号强度随两束入射光偏振方向夹角的变化,得到了比文献报道中更为精确的退偏比数据.
关键词:  退偏比,准确测量,光声拉曼光谱,全局拟合
DOI:10.1063/1674-0068/28/cjcp1409156
分类号: