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 |
|---|---|---|---|
| VIPA Instrument Lineshape Data (Fig. 1D and Fig. 1E) | Unknown | Data from Fig. 1D and Fig. 1E: VIPA instrument lineshape analysis and trends. | Open resource |
| SHA256 File for VIPA Instrument Lineshape Data (Fig. 1D and Fig. 1E) | Text | Open resource | |
| Worked example of modeled transmission spectra (Fig. 5) | Unknown | Data from Fig. 5: Construction of model VIPA transmission spectrum using known instrument lineshape function. | Open resource |
| SHA256 File for Worked example of modeled transmission spectra (Fig. 5) | Text | Open resource | |
| Experimental and simulated spectral data for 0.69 kPa of pure N2O (Fig. 6). | Unknown | Data from Fig. 6: full experimental and simulated model spectra for pure N2O transmission spectrum. | Open resource |
| SHA256 File for Experimental and simulated spectral data for 0.69 kPa of pure N2O (Fig. 6). | Text | Open resource | |
| Instrument lineshape function characterization (Fig. 7) | Unknown | Data from Fig. 7: the composite and full optical instrument lineshape characterization in two dimensions. | Open resource |
| SHA256 File for Instrument lineshape function characterization (Fig. 7) | Text | Open resource | |
| Transmission spectrum of 1.35 kPa of pure N2O at 3 ms of integration time (Fig. 8) | Unknown | Data from Fig. 8: experimental, simulated model, and fitted residuals of rapid VIPA spectroscopy at 3 ms of integration time. | Open resource |
| SHA256 File for Transmission spectrum of 1.35 kPa of pure N2O at 3 ms of integration time (Fig. 8) | Text | Open resource | |
| Allan deviation analysis of N2O isotopic composition (Fig. 9) | Unknown | Data from Fig. 9: Allan deviation analysis of N2O isotopic composition plotted versus both integration time and laboratory time. | Open resource |
| SHA256 File for Allan deviation analysis of N2O isotopic composition (Fig. 9) | Text | Open resource | |
| DOI Access for Precision spectroscopy of nitrous oxide isotopocules with a cross-dispersed spectrometer and a mid-infrared frequency comb | Unknown | Open resource |