Precision spectroscopy of nitrous oxide isotopocules with a cross-dispersed spectrometer and a mid-infrared frequency comb

Description

Data set from peer-reviewed publication: D. M. Bailey et al., Precision spectroscopy of nitrous oxide isotopocules with a cross-dispersed spectrometer and a mid-infrared frequency comb, Analytical Chemistry, 92, 13759-13766 (2020). As a potent greenhouse gas and an ozone depleting agent, nitrous oxide (N2O) plays a critical role in the global climate. Effective mitigation relies on understanding global sources and sinks, which can be supported through isotopic analysis. We present a cross-dispersed spectrometer, coupled with a mid-infrared frequency comb, capable of simultaneously monitoring all singly substituted, stable isotopic variants of N2O. Rigorous evaluation of the instrument lineshape function and data treatment using a Doppler-broadened, low-pressure gas sample are discussed. Laboratory characterization of the spectrometer demonstrates sub-GHz spectral resolution and an average precision of 6.7 x 10^{-6} for fractional isotopic abundance retrievals in 1 s.

Resources

Name Format Description Link
47 https://data.nist.gov/od/ds/mds2-2316/fig6.xlsx.sha256
0 Data from Fig. 9: Allan deviation analysis of N2O isotopic composition plotted versus both integration time and laboratory time. https://data.nist.gov/od/ds/mds2-2316/fig9.xlsx
47 https://data.nist.gov/od/ds/mds2-2316/fig5.xlsx.sha256
47 https://data.nist.gov/od/ds/mds2-2316/fig8.xlsx.sha256
0 Data from Fig. 6: full experimental and simulated model spectra for pure N2O transmission spectrum. https://data.nist.gov/od/ds/mds2-2316/fig6.xlsx
47 https://data.nist.gov/od/ds/mds2-2316/fig1.xlsx.sha256
47 https://data.nist.gov/od/ds/mds2-2316/fig7.xlsx.sha256
47 https://data.nist.gov/od/ds/mds2-2316/fig9.xlsx.sha256
0 Data from Fig. 1D and Fig. 1E: VIPA instrument lineshape analysis and trends. https://data.nist.gov/od/ds/mds2-2316/fig1.xlsx
0 Data from Fig. 7: the composite and full optical instrument lineshape characterization in two dimensions. https://data.nist.gov/od/ds/mds2-2316/fig7.xlsx
0 Data from Fig. 8: experimental, simulated model, and fitted residuals of rapid VIPA spectroscopy at 3 ms of integration time. https://data.nist.gov/od/ds/mds2-2316/fig8.xlsx
0 https://doi.org/10.18434/mds2-2316
0 Data from Fig. 5: Construction of model VIPA transmission spectrum using known instrument lineshape function. https://data.nist.gov/od/ds/mds2-2316/fig5.xlsx

Tags

  • environment-and-climate
  • nitrous-oxide
  • optical-frequency-combs
  • remote-sensing
  • spectroscopy
  • greenhouse-gases

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