Study on broadening of Na D1 and D2 lines spectra in sodium-argon mixture

Shu Hu; Baodong Gai; Xusheng Xia; Dong Liu; Xianglong Cai; Hong Yuan; Shan He; Hui Li; Jinbo Liu; Pengyuan Wang; Ying Chen; Zhonghui Li; Jingwei Guo

doi:10.1117/12.2522100

3 January 2019 Study on broadening of Na D₁ and D₂ lines spectra in sodium-argon mixture

Shu Hu, Baodong Gai, Xusheng Xia, Dong Liu, Xianglong Cai, Hong Yuan, Shan He, Hui Li, Jinbo Liu, Pengyuan Wang, Ying Chen, Zhonghui Li, Jingwei Guo

Author Affiliations +

Proceedings Volume 11042, XXII International Symposium on High Power Laser Systems and Applications; 110420G (2019) https://doi.org/10.1117/12.2522100
Event: XXII International Symposium on High Power Laser Systems and Applications, 2018, Frascati, Italy

Abstract

After the multiphoton ionization of sodium-argon mixture, time-resolved atomic emission spectrum is used to experimentally study the unusual phenomenon of the obviously different broadening between Na D₁ and D₂ lines spectra. The primary reason for the unusual broadening of Na D₂ line is that the spectral line of Ar I 588.9 nm overlays with Na D₂ line (589.0 nm) after ionization, and the serious self-absorption on Na D₂ line is the secondary reason. Although there is difference of population between 3²P_3/2 and 3²P_1/2 states, the experiment result demonstrates that the difference between Na D lines in radiation channel will not affect the broadening of spectral profile.

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Shu Hu, Baodong Gai, Xusheng Xia, Dong Liu, Xianglong Cai, Hong Yuan, Shan He, Hui Li, Jinbo Liu, Pengyuan Wang, Ying Chen, Zhonghui Li, and Jingwei Guo "Study on broadening of Na D₁ and D₂ lines spectra in sodium-argon mixture", Proc. SPIE 11042, XXII International Symposium on High Power Laser Systems and Applications, 110420G (3 January 2019); https://doi.org/10.1117/12.2522100

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