Intensities of all fine-structure resolved rovibrational electric quadrupole absorption lines in $^{16}$O$_2$($X^{3}\Sigma^{-}_{g}$) calculated with a new $\textit{ab initio}$ quadrupole moment curve

Maciej Gancewski; Hubert Jóźwiak; Hubert Cybulski; Piotr Wcisło

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arXiv · 2410.23848

Intensities of all fine-structure resolved rovibrational electric quadrupole absorption lines in $^{16}$O$_2$($X^{3}\Sigma^{-}_{g}$) calculated with a new $\textit{ab initio}$ quadrupole moment curve

Maciej Gancewski·Hubert Jóźwiak·Hubert Cybulski·Piotr Wcisło

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Abstract

The intensities of all rovibrational electric quadrupole absorption lines in $^{16}$O$_2$($X^{3}\Sigma^{-}_{g}$), for which the vibrational quantum number is $v \leq 35$ and the total angular momentum quantum number is $J \leq 40$, are calculated in the intermediate coupling using a new $\textit{ab initio}$ quadrupole moment curve of the ground electronic state of O$_2$. The calculated values agree with those available in the HITRAN database, which at present includes only the $1$-$0$ fundamental vibrational band of $^{16}$O$_2$($X^{3}\Sigma^{-}_{g}$). We therefore recommend using the intensities of the vibrational overtones and hot bands reported here in updating the HITRAN database for O$_2$ in the upcoming 2024 edition.

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Maciej Gancewski, Hubert Jóźwiak, Hubert Cybulski, Piotr Wcisło. 2024-10-31. Intensities of all fine-structure resolved rovibrational electric quadrupole absorption lines in $^{16}$O$_2$($X^{3}\Sigma^{-}_{g}$) calculated with a new $\textit{ab initio}$ quadrupole moment curve. https://arxiv.org/abs/2410.23848

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