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Evaluation of self-absorption coefficients of aluminum emission lines in laser-induced breakdown spectroscopy measurements |
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| Authors: | AM El Sherbini ThM El Sherbini H Hegazy G Cristoforetti S Legnaioli V Palleschi L Pardini A Salvetti E Tognoni |
| Institution: | aLaboratory of Lasers and New Materials, Physics Department, Faculty of Science, Cairo University, Egypt bAtomic Energy Authority, Nuclear Research Center, Plasma Physics Department, Enchass 13759, Egypt cApplied Laser Spectroscopy Laboratory, Institute for Chemical-Physical Processes Research Area of National Research Council, Via G. Moruzzi, 1 56124 Pisa, Italy |
| Abstract: | In quantitative Laser Induced Breakdown Spectroscopy (LIBS) measurements it is essential to account for the effect of self-absorption on the emission lines intensity. In order to quantify this effect, in this paper we propose a simple method for evaluating the ratio between the actual measured line intensity and the intensity expected in absence of self-absorption and, if necessary, correcting the effect of self-absorption on line intensity. The method, based on a homogeneous plasma model, is applicable when the plasma electron density is known and in particular to lines whose Stark broadening parameter is available. |
| Keywords: | LIBS Spectroscopy Double pulse Self-absorption Stark broadening |
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