High spectral resolution of diode laser absorption spectroscopy for isotope analysis using a supersonic plasma jet,Journal of Analytical Atomic Spectrometry

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High spectral resolution of diode laser absorption spectroscopy for isotope analysis using a supersonic plasma jet
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2018-05-18 00:00:00 , DOI: 10.1039/c8ja00120k
Akira Kuwahara _{1,

2,

3,

4,

5} , Yasuaki Aiba _{3,

4,

5,

6} , Shinya Yamasaki _{3,

7,

8,

9} , Takuya Nankawa _{2,

3,

10} , Makoto Matsui _{3,

4,

5,

6}

Affiliation

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.

中文翻译：

使用超声波等离子体射流进行同位素分析的二极管激光吸收光谱法的高光谱分辨率

尽管高温等离子体源已用于固体样品的直接同位素分析，但高温等离子体中二极管激光吸收光谱的光谱分辨率受到原子吸收谱线多普勒展宽的限制。因此，降低平移温度对于提高光谱分辨率和区分由于质量数引起的同位素位移是必要的。在这项研究中，超音速等离子风洞（也称为电弧喷射等离子风洞）被用来大幅提高光谱分辨率，并使用天然稳定的氙同位素进行了演示。结果，发现温度为约180K，并且光谱分辨率比常规高温源的光谱分辨率高约一个数量级。此外，

更新日期：2018-05-18

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