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首页> 外文期刊>Applied optics >Measurement of lithium isotope ratio in various concentration samples using degenerate four-wave mixing
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Measurement of lithium isotope ratio in various concentration samples using degenerate four-wave mixing

机译：使用简并四波混频测量不同浓度样品中的锂同位素比

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Phase-conjugate degenerate four-wave mixing (PCDFWM), as a sub-Doppler spectroscopy technique, can be employed to selectively analyze Li isotopes. It is necessary to explore the optimal incident powers in order to measure the Li isotope ratio accurately. In this case, the power condition of PCDFWM signal is first investigated using samples with various concentrations. The results indicate that the power characteristic is intimately related to the sample concentration, and the optimal incident power conditions for different sample concentrations are different. Under their own optimized power conditions, we measured the Li-7/Li-6 isotope ratio in Li standard solutions of 500, 300, and 200 ng/ ml. The corresponding results are, respectively, 11.571 +/- 0.003, 11.552 +/- 0.003, and 11.582 +/- 0.004, which are in good agreement with the value calculated by atomic absorption spectroscopy. The information obtained from this study suggests that PCDFWM can be used to measure isotope ratios accurately in samples with different concentrations under suitable power conditions. (C) 2015 Optical Society of America
机译：相子简并简并四波混频（PCDFWM）作为亚多普勒光谱技术，可用于选择性分析Li同位素。为了准确地测量锂同位素比，有必要探索最佳入射功率。在这种情况下，首先使用各种浓度的样品研究PCDFWM信号的功率条件。结果表明，功率特性与样品浓度密切相关，不同样品浓度的最佳入射功率条件也不同。在他们自己的最佳功率条件下，我们在500、300和200 ng / ml的Li标准溶液中测量了Li-7 / Li-6同位素比率。相应的结果分别为11.571 +/- 0.003、11.552 +/- 0.003和11.582 +/- 0.004，与通过原子吸收光谱法计算的值非常吻合。从这项研究中获得的信息表明，PCDFWM可用于在合适的功率条件下准确测量具有不同浓度的样品中的同位素比率。 （C）2015年美国眼镜学会

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