Quantitative analysis of hydrogen isotopes in hydrogen storage material using laser-induced breakdown spectroscopy

Nuclear Materials and Energy

Qiang Li¹  Xu Huang²  Ruizhu Yang²  Jiliang Wu²  Zhen Yang²  Xiaoqiu Ye²  Yubo Xing³ 

[1] Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, Sichuan, China;Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, Sichuan, China;Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, Guangdong, China;

关键词: Quantitative analysis;    Hydrogen isotope;    Hydrogen storage;    Laser-induced breakdown spectroscopy;    Single sample correction;   

DOI  :  

来源: DOAJ

【 摘 要 】

The accurate determination of hydrogen isotopes in materials is always a challenge for laser-induced breakdown spectroscopy (LIBS). In this study, the content of hydrogen isotopes in hydrogen storage materials is quantitatively analyzed by LIBS using the internal standard method (ISM) and the calibration-free method (CF-LIBS), respectively. Based on the self-built LIBS system, the concentrations of hydrogen and deuterium in titanium hydride with various stoichiometric ratios are quantitatively analyzed. The local thermodynamic equilibrium (LTE) conditions of the plasma are evaluated by the calculation results of the plasma temperature and density: the plasma temperatures are 16000 ± 1000 K calculated by Boltzmann diagram of titanium, and the plasma electron densities are about 1022 m−3 calculated by the Hα line of spectra. Through integral intensity correction, the correlation coefficient of the calibration curves of hydrogen and deuterium is successfully increased by 3% in the internal standard method; The single sample correction is used in CF-LIBS to improve the accuracy of the measurement of hydrogen isotopes in titanium hydride, and the calibration results demonstrate that the average absolute errors are 8.3% and 3.2% for hydrogen and deuterium. We also compare the calculated contents of hydrogen isotopes in titanium hydride by integral intensity correction internal standard method (IICIS) and single sample correction calibration-free method (SSCCF). The SSCCF increases the accuracy of the hydrogen isotope contents compared with CF-LIBS in the range of 20 to 55 at.%. The results are not as precise as the IICIS but meet the ITER requirements in a way. The results provide a valuable reference for the precise measurement of hydrogen isotope content in materials for applications in hydrogen energy, nuclear energy, and nuclear technology.

【 授权许可】

Unknown