Measurements doubly-substituted methane isotopologue (13CH3D and 12CH2D2) abudance using frequency stabilized mid-ir cavity ringdown spectroscopy
Shen, Linhan
Loading…
Permalink
https://hdl.handle.net/2142/91427
Description
Title
Measurements doubly-substituted methane isotopologue (13CH3D and 12CH2D2) abudance using frequency stabilized mid-ir cavity ringdown spectroscopy
Author(s)
Shen, Linhan
Contributor(s)
Okumura, Mitchio
Bui, Thinh Quoc
Issue Date
2016-06-20
Keyword(s)
Spectroscopy in Atmospheric Chemistry
Abstract
In this work, we demonstrated a spectroscopic method of measuring abundances of doubly-substituted methane isotopologues ($^{13}$CH$_{3}$D, $^{12}$CH$_2$D${2}$). In this method, we use a frequency stabilized cavity ringdown spectroscopy (FS-CRDS) technique to measure $\Delta$$^{12}$CH$_2$D${2}$ in naturally abundant methane to sub 0.1$\%$ level within one hour of average. Compare to traditional isotope-ratio mass spectrometer, which requires more than 24 hours of average to achieve comparable precision, this method provides a fast way of measuring clumped isotopologue abundance optically without destroying samples.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
