Patent ID: 6069695
Filing Date: 2000-05-30
Classification: G01N

Abstract:
A method for spectral analysis by means of laser emission of non-metallic or at most partially metallic materials containing halogen, in particular chlorine, a pulsed laser beam (P) being directed at the material (T) to generate a plasma (and the light emitted by the plasma in an expansion direction in conical form being focussed optically, being passed to a spectrometer (SP) and being analyzed after a predefined delay after the pulsed laser beam (P) has been triggered, and the pulsed laser beam (P) having an energy density between about 10.sup.8 and about 10.sup.12 W/cm.sup.2, wherein averaging is carried out temporally and spatially over a range of density gradients and temperature gradients of the plasma (in order to obtain stable, reproducible and high-luminosity spectral line information for analysis, by means of all of the luminous intensities emanating from at least one volume slice (V) of the expansion cone being summed and averaged.