We report on the application of an innovative spectroscopic balancing technique to measure isotopologue abundance quantification. We employ quartz enhanced photoacoustic spectroscopy in a 2f wavelength modulation mode as an absorption sensing technique and water vapor as a test analyte. Isotope absorption lines with very close lower energy levels and with the same quantum numbers have been selected to limit the sensitivity to temperature variations and guarantee identical broadening relaxation properties. A detection sensitivity in measuring the deviation from a standard sample δ18O of 1.4‰, in 200 sec of integration time was achieved.
|Titolo:||Spectroscopic measurements of isotopic water composition using a new modulation cancellation method|
|Data di pubblicazione:||2012|
|Nome del convegno:||Conference on Quantum Sensing and Nanophotonic Devices IX|
|Digital Object Identifier (DOI):||10.1117/12.912499|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|