LIBS Analysis of Geomaterials: Comparative Study of Basalt Plasma Induced by TEA CO₂ and Nd:YAG Laser in Air at Atmospheric Pressure

Figure 2

LIBS spectra obtained on the basalt sample with a single TEA CO₂ laser pulse using a nongated detection and with Nd:YAG laser and time-gated detection (delay: 1.27 μs; integration time gate: 1.1 ms). In both cases, the plasma was induced in air at atmospheric pressure.