样品制备条件对激光诱导土壤等离子体辐射的影响

Influence of Sample's Preparation Conditions on Laser-Induced Soil Plasma Radiation

为了获得高质量的激光等离子体光谱,以土壤样品为靶,实验研究了不同制备条件下的样品对激光诱导等离子体辐射的影响。结果表明,随着制备样品所用压强从8MPa到20MPa的增加,样品密度增大,等离子体的发射光谱强度和信背比都逐渐提高。当分别用100#、360#、600#砂纸处理样品表面后,发现600#砂纸打磨样品可以获得更高质量的激光光谱。所以,样品制备条件是影响激光光谱质量的重要因素之一。

In order to obtain high quality laser-induced plasma spectra, the influence of different conditions during soil samples preparation on the radiation generated from the laser-induced plasma was investigated. The results show that the density was increased and the line intensities and signal-to-hackground ratio were enhanced with the pressure rising from 8MPa to 20MPa for sample preparation. After polishing the surface of the sample by 100 # ,360 # and 600 # sandpaper, it was found that the high-quality laser spectra could be obtained with the 600 # sandpaper. Consequently, it has been identified that the condition of sample preparation is one of the most important factors that affect the quality of laser spectra.