Title of article :
Kinetic processes for laser induced plasma diagnostic: A collisional-radiative model approach
Author/Authors :
Pietanza، نويسنده , , L.D. and Colonna، نويسنده , , G. and De Giacomo، نويسنده , , A. and Capitelli، نويسنده , , M.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
A zero-dimensional collisional–radiative (CR) model, coupled self-consistently with the electron Boltzmann equation, has been applied to the description of a metallic-laser induced plasma at experimental conditions typical of LIBS experiment. To take in account expansion effects, the experimental temperature and total number density as function of time have been used as input data. Plasma composition and the simultaneous time evolution of both heavy particle level distributions and the electron energy distribution function have been calculated by taking into account the most relevant collisional and radiative processes. This approach estimates the hierarchy of the elementary processes during the expansion and possible deviations from LTE conditions. The comparison of the experimental and theoretical results shows a good agreement, but at the same time new questions arise on the analysis of spectroscopic results and on the assumption generally made in LIBS.
Keywords :
Collisional–radiative model , Kinetic processes , LIBS , Aluminium , Local thermodynamic equilibrium (LTE)
Journal title :
Spectrochimica Acta Part B Atomic Spectroscopy
Journal title :
Spectrochimica Acta Part B Atomic Spectroscopy