High spectral resolution of diode laser absorption spectroscopy for isotope analysis using a supersonic plasma jet

Kuwahara, Akira; Aiba, Yasuaki*; Yamasaki, Shinya*; Nankawa, Takuya; Matsui, Makoto*

Journal of Analytical Atomic Spectrometry, 33(7), p.1150 - 1153, 2018/07

https://doi.org/10.1039/C8JA00120K

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 mass number. In this study, a supersonic plasma wind tunnel, also called an arc-jet plasma wind tunnel, was used to enhance 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.

The Effect of the pressure broadening for isotopic analysis using diode laser

Kuwahara, Akira; Aiba, Yasuaki*; Matsui, Makoto*; Nankawa, Takuya

no journal, , 

no abstracts in English

Development of isotope analytical method based on diode laser absorption spectroscopy using arc-jet plasma wind tunnel

Kuwahara, Akira; Aiba, Yasuaki*; Nankawa, Takuya; Matsui, Makoto*

no journal, ,