A numerical procedure for understanding the self-absorption effects in laser induced breakdown spectroscopy

Abstract

Self-absorption (SA) of analytical plasmas is studied by simulating optically thick emission spectra. The study found that SA decreases at higher plasma temperatures but increases with longer optical path lengths and higher analyte concentrations.

A Review of Development in the Research of Self-Absorption on Laser-Induced Breakdown Spectroscopy

“…Aguilera et al 120 found that the self-absorption of non-resonant lines with increasing delay time, and this tendency does not diminish until a specific value. However, it is noteworthy that a simulation method proposed by John et al 123 revealed that resonant lines exhibit stronger selfabsorption compared to non-resonant lines.…”

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…Dependence of the self-absorption coefficient on the plasma temperature, optical path length and element concentration in a sample was investigated by John et al , 97 using a numerical procedure to simulate optically thick emission spectra. Results indicated that self-absorption decreases with increased plasma temperature, whereas it increases with increasing optical path length and analyte concentration.…”

Impact of intensity error on temperature estimation in laser-induced breakdown spectroscopy: a numerical study

“…Recently, our team published a study simulating optical emission spectra under typical LIBS conditions to simulate neutral and singly ionized species [24]. Simulation of optical emission spectra (OES) at typical LPP conditions is a convenient tool for understanding the characteristic emission of lines of multielement samples in LIBS experiments [25,26]. The input parameters for the simulation are electron number density, plasma temperature, and percentage composition (atomic number fraction) of the constituent elements.…”