Collision-dependent line areas in the a1∆g← X3Σ−g band of molecular oxygen

Fleisher, Adam J.

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https://hdl.handle.net/2142/79387 Copy

Description

Title

Collision-dependent line areas in the a1∆g← X3Σ−g band of molecular oxygen

Author(s)

Fleisher, Adam J.

Contributor(s)

• Hodges, Joseph
• Sironneau, Vincent

Issue Date

25-Jun-15

Keyword(s)

Atmospheric science

Abstract

We report precise line areas for individual rotationally resolved transitions within the $a^1Delta_gleftarrow$ $X^3Sigma^-_g$ electronic band of molecular oxygen recorded as a function of pressure for both neat samples of chem{O_2} as well as samples of chem{O_2} dilute with a variety of collisional partners. Using optical frequency comb referenced frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) near 1.27 $mu$m we measure line areas with a quality-of-fit QF $leq$ 50,000 using a partially correlated quadratic-speed-dependent Nelkin-Ghatak profile. This spectrometer has achieved this high QF by both suppressing coupled cavity effects and by preserving a high-fidelity frequency axis with absolute frequency accuracy approaching 1 part in 10$^9$. With this instrument we are also currently exploring collision-induced absorption (CIA) and perturbative line mixing effects in chem{O_2} over the entire 7800-7940 wn spectral range.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/79387

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