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Raman detector of carbon isotopes

We introduce a Raman scattering based detector of carbon isotopes in gaseous mixtures. A solid state 532 nm 5 W CW laser focused into a gaseoussample by a custom-built diffraction-limited objective was used for excitation of Raman signal. Raman signal was collected by an f-matcher with edge filter at excitation wavelength of 532 nm. A Czerny-Turner scheme based spectrometer and a cooled down to -40°C CMOS camera were used to register the signal.