Experimental Study of Laser-Induced Brass and Copper Plasma for Spectroscopic Applications

Figure 4

The relationship between the number of pulses in the same spot and the intensity of selected lines obtained by ablation of a brass sample at 0.32 μs. Intensities are from neutral copper (324.7 nm and 521.7 nm), neutral zinc (334.5 nm and 481.1 nm), and singly ionized zinc (255.8 nm). Emission lines at 393.4 and 396.8 nm belong to an unidentified pollutant on the surface of the target. The horizontal dashed line is the background level.