Time-resolved spectroscopy for 5s′4D7/2 state transitions undergoing electron–ion recombination in femtosecond laser-produced copper plasma<xref rid="cpb_26_12_124208_fn1" ref-type="fn">*</xref> <fn id="cpb_26_12_124208_fn1"> <label>*</label> Project supported by the National Natural Science Foundation of China (Grant No. 51705009) and the NSAF of China (Grant No. U1530153). </fn>

Time-resolved spectroscopy for 5s′⁴D_7/2 state transitions undergoing electron–ion recombination in femtosecond laser-produced copper plasma* *

Project supported by the National Natural Science Foundation of China (Grant No. 51705009) and the NSAF of China (Grant No. U1530153).

Song Hai-Ying¹, Li Hui¹, Zhang Yan-Jie¹, Gu Peng¹, Liu Hai-Yun¹, Li Wei², Liu Xun², Liu Shi-Bing^{1, †}

(color online) Dependence of spectral property on laser intensity. (a) Spectral lifetimes of Λ₁ line and Λ₂ line, and CS, where the solid lines are corresponding numerical fitted-lines. (b) Spectral peak intensities (I_s) of Λ₁ line and Λ₂-line. (c) Ratio of spectral peak intensities of Λ₁ line to Λ₂ line in panel (b).