The Effect of Temperature on the Spectral Emission of Plasma Induced in Water

Abstract

A numerical modeling investigation of the spectral emission of laser-induced plasma in MgCl 2 -NaCl aqueous solution has been presented. A model based on equilibrium equations has been developed for the computation of the plasma composition and excited levels population. Physical interpretation is presented to comment on �rstly the evolution of atomic species number densities, and secondly on the population of the excited species emitting MgII and NaI resonant lines for temperatures ranging from 3000 K to 20 000 K. It is shown that MgII line reach a maximum of population on the issuing level, at norm temperature of 13800 K. Whereas, NaI line presents two norm temperatures, evaluated at 3300 K and 11700 K. is splitting of the NaI norm temperature is explained by the low-ionization potential and weak concentration of the sodium atom in this aqueous solution. us, the proposed model can be useful to predict the optimal plasma temperature for the detection of given chemical element, which is not easy to reveal experimentally.

A review of colored light production by pyrotechnic materials

“…This might be due to the recombination of Na + ions that compensates for the Na ionization process. At high temperatures, intensive ionization leads to an increase in the electron density, which favors the recombination of Na + ions due to the low ionization potential of Na [58].…”