Near-infrared high resolution overtone spectroscopy of the hydronium ion H$_3$O$^+$: the $2ν_3^{2+}$ and $2ν_3^{2-}$ bands
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912594813517824 |
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| author | Schleif, Chiara Bunn, Hayley A. Jiménez-Redondo, Miguel Caselli, Paola Jusko, Pavol |
| author_facet | Schleif, Chiara Bunn, Hayley A. Jiménez-Redondo, Miguel Caselli, Paola Jusko, Pavol |
| contents | This work presents the rovibrational spectra of the two strongest first overtone bands of the asymmetric stretching mode $ν_3$ ($2ν_3^{2+}$ and $2ν_3^{2-}$) of the hydronium ion, H$_3$O$^+$. The measurements were performed in a temperature-variable cryogenic 22 pole ion trap using leak-out spectroscopy (LOS), covering an energy range of $6750-6950$ cm$^{-1}$.
The spectra were fit with a standard oblate symmetric top Hamiltonian and additional off-diagonal matrix elements accounting for $l$-doubling to obtain the spectroscopic constants and the band origins, which were determined to be $6845.610(14)$ cm$^{-1}$ for $2ν_3^{2+}$ and $6878.393(13)$ cm$^{-1}$ for $2ν_3^{2-}$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_16009 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Near-infrared high resolution overtone spectroscopy of the hydronium ion H$_3$O$^+$: the $2ν_3^{2+}$ and $2ν_3^{2-}$ bands Schleif, Chiara Bunn, Hayley A. Jiménez-Redondo, Miguel Caselli, Paola Jusko, Pavol Atomic Physics Chemical Physics This work presents the rovibrational spectra of the two strongest first overtone bands of the asymmetric stretching mode $ν_3$ ($2ν_3^{2+}$ and $2ν_3^{2-}$) of the hydronium ion, H$_3$O$^+$. The measurements were performed in a temperature-variable cryogenic 22 pole ion trap using leak-out spectroscopy (LOS), covering an energy range of $6750-6950$ cm$^{-1}$. The spectra were fit with a standard oblate symmetric top Hamiltonian and additional off-diagonal matrix elements accounting for $l$-doubling to obtain the spectroscopic constants and the band origins, which were determined to be $6845.610(14)$ cm$^{-1}$ for $2ν_3^{2+}$ and $6878.393(13)$ cm$^{-1}$ for $2ν_3^{2-}$. |
| title | Near-infrared high resolution overtone spectroscopy of the hydronium ion H$_3$O$^+$: the $2ν_3^{2+}$ and $2ν_3^{2-}$ bands |
| topic | Atomic Physics Chemical Physics |
| url | https://arxiv.org/abs/2509.16009 |