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Quantitative Analysis procedure for the analysis of the elemental Composition of materials by the libs technique
Quantitative Analysis procedure for the analysis of the elemental Composition of materials by the libs technique
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机译：使用libs技术分析材料元素组成的定量分析程序
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摘要
Quantitative Analysis procedure for the analysis of the elemental Composition of materials by Laser Induced plasma Spectroscopy technique, known as libs,To determine the concentrations of the elements that Compose a set of samples of materials from which can generate a plasma induced by Laser RadiationWhere the procedure includes the following steps: 1.A step of obtaining characteristic parameters of the plasma Radiation which is detected by the system parameters, including the electron Density Nze.Tzj J, the temperature, the product (NL) ZJ total Density n, including Atoms and ions with a load Unit for All elements present in the sample,The length l along the line of sight and the product (u03b2a ZJ area) to cross the line of Sight by the instrumental factor beta SystemDefined as the number of Counts obtained per Watt of accumulated Radiation, being defined parameter values for different values of the indices (J, Z),Taking the index z values Z = 0 for the region Station lines of neutral Atoms and Z = 1 for the region of Ion Channel load Unit, the index J values taking J = 0, 1,...The index J, N = 0 corresponding to a model of plasma model known as homogeneous plasma.Stations in the regions of lines of neutral Atoms and ions are considered homogeneous load unit and corresponding values (J = 1,...N, a model called Model non homogeneous regions, in which stations lines of neutral Atoms and ions with charge unit is divided into a number of areas.Each subindex J considered Uniform, Defining the value of the parameter in each area.And also the limit value for the validity of the model is not homogeneous areas (u03c4lu0394u03bbl) zlim with Z = 0, 1, Product u03c4lu0394u03bbl, where u03c4l is Optical Depth LineDefined by * * * * (see formula) where C is the concentration of the element in the material expressed in Atomic percent (AT.u03c3l%), where is the cross section of line, given by the equation (see * * * * u03bbl formula) where d is the width of the lorentzian LineDetermined by multiplying the Stark width W for the electron Density Nze, 0, where KT is * * * * (see formula) where e is the Elementary charge, u03b50 is the permittivity of Free Space.M is the electron Mass, K is the Boltzmann Constant, u03bb0 is the central Wavelength of the transition, GI Is The degeneration of the lower level.The EK are Energies of the lower and Upper, F is the force of Oscillator, u is the partition function of the emitting species and RI is the factor of IonizationDefined as follows * * (see formula for neutral Atoms) * * * * * * (see formula) for ions with a load unit where S10 is the relation given by the Law of SahaIon density between the load unit and the density of neutral Atoms;
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