Investigation of the spectral and temporal characteristics of plasma radiation in the case of breakdown on the surface of Ca aqueous solutions generated by femtosecond laser pulses

Filament induced breakdown spectroscopy with enhanced excitations from plasma gratings

“…The slope of the intensity along the time delay at Si( i ) 298.77 nm was gentler than that of Si( i ) 288.16 nm, which corresponds to the same lower level 1 D 2 (6298.85 cm −1 ), but different upper levels ( 3 P 1 and 1 P 1 , with energies of 39 760.29 cm −1 and 40 991.88 cm −1 , respectively). The intensities of Si( ii ) spectral lines exhibited a more noticeable change as the time delay increased and disappeared at about 250 ns, which is consistent with previous research results on the Ca( ii ) 43 spectral line.…”