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Title:Cavity ring-down spectroscopy of hydrogen in the 784-852 nm region and corresponding line shape implementation into hitran
Author(s):Tan, Yan
Contributor(s):Rothman, Laurence S.; Gordon, Iouli E; Kochanov, Roman V; Wcislo, Piotr; Hu, Shui-Ming; Liu, An-Wen; Cheng, Cunfeng; Wang, Jin
Subject(s):Fundamental physics
Abstract:The hydrogen molecule as the most abundant neutral molecule in the universe is an important object of studies in different areas of science, especially astrophysics. The precision spectroscopy of the hydrogen molecule is particularly useful to verify the quantum electrodynamics theory (QED) in a molecular system. The electric quadrupole transitions of the second overtone of H$_2$ have been recorded with a high precision cavity ring-down spectrometer.\footnote{Tan Y, Wang J, Cheng C-F, Zhao X-Q, Liu A-W, Hu S-M, J Mol Spectrosc 2014
} A total of eight lines including the extremely weak S$_{3}(5)$ line in the $784-852$ nm range have been observed. The line positions have been determined to an accuracy of $3 \times 10^{-4}$ cm$^{-1}$ and the line intensities were determined with a relative accuracy of about 1\%. The deviations between the experimental and theoretical frequencies are less than $5 \times 10^{-4}$ cm$^{-1}$, which is much smaller than the claimed theoretical uncertainty of 0.0025cm$^{-1}$. The data from this experiment along with other high-quality H$_2$ spectra have also been analyzed by the Hartmann-Tran\footnote{Tran H, Ngo NH, Hartmann J-M, J Quant Spectrosc Radiat Transf 2013
} profile as a test case for incorporating\footnote{Wcislo P, Gordon IE, Tran H, Tan Y, Hu S-M, Campargue A, et al., Accepted J Quant Spectrosc Radiat Transf HighRus Special Issue, 2015} parametrization of this profile in the HITRAN\footnote{Rothman LS, Gordon IE, Babikov Y, Barbe A, Chris Benner D, Bernath PF, et al., J Quant Spectrosc Radiat Transf 2013
} database. It was incorporated in the new relational structure of the HITRAN database ( and into the HITRAN Application Programming Interface (HAPI)\footnote{Kochanov RV, Gordon IE, Rothman LS, Wcislo P, Hill C, Wilzewski JS, Submitted to J Quant Spectrosc Radiat Transf HighRus Special Issue, 2015.} for the case of H$_2$ spectra.
Issue Date:2016-06-24
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper/Presentation
Rights Information:Copyright 2016 by the authors
Date Available in IDEALS:2017-01-26

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