Abstract: A measuring method for measuring an isotope ratio of an element present in a material includes a plurality of elements, the method comprising the following steps: a step of applying at least one laser beam to the material so as to generate a plasma, the plasma being able to emit a light spectrum comprising a plurality of spectral lines emitted by the elements of the material; a measuring step able to measure the profile of at least one spectral line of interest emitted by the element of interest, the measuring step comprising carrying out, with a spectrometer, at least one analysis of the light spectrum emitted by the plasma; a processing step able to note in the profile of the spectral line of interest the optimal wavelength corresponding to a point of equilibrium; and a step of determining the isotope ratio depending on the noted optimal wavelength.

Abstract: The invention relates to a smoke analysis characterization cell employing optical spectroscopy, which comprises: a reaction chamber, an inlet orifice for injecting smoke into the reaction chamber; an outlet orifice for discharging the smoke from the reaction chamber; and an analysis window for the entry of a laser beam intended to form the plasma inside the reaction chamber, which cell is characterized in that the system further includes a blower for blowing an inert gas close to the analysis window; and a shielding gas injector for the shielded injection of the smoke into the reaction chamber, the shielding being provided by a jet of inert gas around the smoke.

Abstract: The invention relates to a smoke analysis characterization cell employing optical spectroscopy, which comprises: a reaction chamber, an inlet orifice for injecting smoke into the reaction chamber; an outlet orifice for discharging the smoke from the reaction chamber; and an analysis window for the entry of a laser beam intended to form the plasma inside the reaction chamber, which cell is characterized in that the system further includes a blower for blowing an inert gas close to the analysis window; and a shielding gas injector for the shielded injection of the smoke into the reaction chamber, the shielding being provided by a jet of inert gas around the smoke.