Measurements of the isotopic composition of water vapor using a DFG-based spectrometer at |
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Authors: | G Rusciano F Pignatiello A Sasso |
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Institution: | aIstituto Nazionale Fisica della Materia, U.d.R. Napoli, Italy;bDipartimento Scienze Fisiche Università di Napoli “Federico II”, Complesso Universitario Monte S.Angelo, Via Cinthia, 80126 Napoli, Italy |
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Abstract: | We report on absorption measurements of the isotopic composition of water in a demineralized sample by means of wavelength modulation spectroscopy of H2O lines in the spectral region around . The mid-IR radiation was obtained by difference-frequency mixing of the radiation of an extended cavity diode laser () and that of a diode-pumped monolithic Nd–YAG laser. Preliminary tests indicate the possibility of obtaining a precision for the 18O/16O, 17O/16O and 2H/16O isotope ratio measurements of the order of 1 per mil. |
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Keywords: | Absorption Isotopic composition Wavelength modulation spectroscopy |
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