High spectral resolution of diode laser absorption spectroscopy for isotope analysis using a supersonic plasma jet
High spectral resolution of diode laser absorption spectroscopy for isotope analysis using a supersonic plasma jet
复制标题
DOI：
10.1039/c8ja00120k
复制
发表时间：
2018-07-01
影响因子：
3.4
通讯作者：
Matsui, Makoto
中科院分区：
文献类型：
--
作者：
Kuwahara, Akira;Aiba, Yasuaki;Matsui, Makoto
虽然高温等离子体源已被用于固体样品的直接同位素分析，但高温等离子体中的二极管激光吸收光谱的光谱分辨率受到原子吸收线的多普勒展宽的限制。因此，平移温度的降低是必要的，以提高光谱分辨率和区分同位素位移由于质量数。在这项研究中，一个超音速等离子体风洞，也被称为电弧喷射等离子体风洞，用于提高光谱分辨率大幅，并进行了演示使用天然稳定的氙同位素。结果发现，温度约为180 K，光谱分辨率比常规高温源高约一个数量级。此外，本文提出的方法进行了验证，通过使用两个氙同位素。
Although high-temperature plasma sources have been used for direct isotope analysis of solid samples, the spectral resolution of diode laser absorption spectroscopy in high-temperature plasma is limited by the Doppler broadening of atomic absorption lines. Thus, a decrease in translational temperature is necessary to enhance the spectral resolution and distinguish isotope shifts due to the mass number. In this study, a supersonic plasma wind tunnel, also called an arc-jet plasma wind tunnel, was used to enhance the spectral resolution drastically, and a demonstration was carried out using natural stable xenon isotopes. As a result, the temperature was found to be about 180 K, and the spectral resolution was about one order of magnitude higher than that of the conventional high-temperature source. Additionally, the method proposed herein was verified by using two xenon isotopes.