We report the spectroscopic studies of the Kohl plasma produced in air at atmospheric pressure by Laser Induced Breakdown Spectroscopy (LIBS) and Atomic Absorption Spectroscopy (AAS) techniques. The plasma has been produce using Q-switched Nd:YAG laser at Second Harmonic Generation SHG (532 nm), with laser irradiance of 4 × 10¹⁰ W/cm², 10 Hz repetition rate and 5ns pulse duration. From the spectroscopic analysis of the registered spectrum, we have detected the presence of Pb, C, Ca, Cr, Fe, Ba, Zn, Hg, Na and H. The electron temperature has been determined from the intensity ratio of the two transition lines of Pb– I, 368.34 nm and 373.99 nm, whereas the electron number density has been estimated from the Stark broadening profile of the ${\text{H}}_{\text{α}}$ line at 656.28 nm.

It has been noticed that the maximum value of the electron temperature and electron number density at the initial stage of the plasma. The electron temperature varies as (15500–11600) K and the number density varies as (2.06 × 10¹⁷–3.62 × 10¹⁶) cm⁻³ with the delay time of (1-6) μs.

我们报告了通过激光诱导击穿光谱 (LIBS) 和原子吸收光谱 (AAS) 技术在大气压力下产生的科尔等离子体的光谱研究。等离子体是使用 Q 开关 Nd:YAG 激光在二次谐波生成 SHG (532 nm) 下产生的，激光辐照度为 4 × 10 ¹⁰  W/cm ²，10 Hz 重复频率和 5ns 脉冲持续时间。从注册光谱的光谱分析中，我们检测到 Pb、C、Ca、Cr、Fe、Ba、Zn、Hg、Na 和 H 的存在。 电子温度已由两条跃迁线的强度比确定Pb–I，368.34 nm 和 373.99 nm，而电子数密度已从${\text{H}}_{\text{α}}$ 线在 656.28 nm。

已经注意到等离子体初始阶段的电子温度和电子数密度的最大值。电子温度变化为(15500–11600) K，数密度变化为(2.06 × 10 ¹⁷ –3.62 × 10 ¹⁶ ) cm ^-3，延迟时间为(1-6) μs。