DOE Phase II SBIR grant DE-SC0015258
Started Aug 2017
Isotope ratio measurements of common soil gases (carbon dioxide, oxygen, and nitrogen) are crucial for understanding fully biogeochemical activity in soil and subsoil. Mesa Photonics is developing an optical isotope analyzer based on Raman spectroscopy for field measurements of isotope ratios. The technique is particularly useful for N2 and O2 isotopes because field instruments for these gases are not commercially available.
The spectrum shows Raman spectra of standard isotopic abundance 14N15N and 14N2 for parallel and perpendicular polarizations.