Stark broadening parameters have been estimated for resonant lines of Al(I) using time resolved measurements. The relation between the various emission line characteristics at different phases of opacity have been utilized to obtain the value of plasma temperature and Stark width parameters from the experimental data. The observed value of the center line intensity and Lorentzian component of the line width are compared against a simulated value of these parameters for optically thin case. The plasma temperature and Stark broadening parameters are obtained for the best fit condition by matching the experimentally observed and the simulated values of intensity and line widths. The time resolved measurements result in much better estimates for Stark parameters by allowing multiple points for fitting keeping the number of variables limited. The Stark shift parameters are also obtained from the slope of the plot of observed central wavelength shifts versus observed electron number density which is measured as a function of time. Hence, a method utilizing multiple-time observation data to obtain the Stark broadening parameters for lines showing self-absorption has been demonstrated.

中文翻译：

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使用时间分辨激光诱导击穿光谱 (LIBS) 测量确定斯塔克位移和宽度

已经使用时间分辨测量估计了 Al(I) 共振线的明显展宽参数。不同不透明度阶段的各种发射线特性之间的关系已被用来从实验数据中获得等离子体温度和斯塔克宽度参数的值。将中心线强度和线宽洛伦兹分量的观测值与光学薄情况下这些参数的模拟值进行比较。通过匹配实验观察到的强度和线宽的模拟值，获得最佳拟合条件的等离子体温度和斯塔克展宽参数。通过允许多个点进行拟合，保持变量数量有限，时间分辨测量可以更好地估计 Stark 参数。斯塔克位移参数也可从观察到的中心波长位移对观察到的电子数密度的曲线的斜率中获得，该图作为时间的函数测量。因此，已经证明了一种利用多次观测数据获得显示自吸收线的斯塔克展宽参数的方法。