### Abstract

Transitions belonging to the three “hot” bands of the S^{18}O_{2} molecule, ν_{1}+ν_{2}+ν_{3}−ν_{2} (621 transitions with the values of quantum numbers J^{max}=49 and K_{a} ^{max}=14), 2ν_{1}+ν_{2}−ν_{2} (332 transitions with J^{max}=42 and K_{a} ^{max}=12) and 2ν_{2}+ν_{3}−ν_{2} (15 transitions with J^{max}=14 and K_{a}=8 and 9), were assigned in the spectral 2100–2700 cm^{−1} region. This enabled for the first time to get high accurate values of 388, 185 and 13 ro-vibrational energies for the highly excited vibrational states (111), (210) and (021), respectively. A weighted fit analysis using the obtained ro-vibrational energies allowed us to generate a set of 20 fitted parameters which reproduce the initial 586 energy values (about 970 assigned experimental transitions) with the d_{rms} deviations of 1.9×10^{−4}cm^{−1}, 2.8×10^{−4} cm^{−1} and 2.5×10^{−4} cm^{−1} for the states (111), (210) and (021).

Original language | English |
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Pages (from-to) | 159-164 |

Number of pages | 6 |

Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |

Volume | 196 |

DOIs | |

Publication status | Published - 1 Jul 2017 |

### Keywords

- SO
- High-resolution spectra
- Spectroscopic parameters
- Sulfur dioxide

### ASJC Scopus subject areas

- Radiation
- Atomic and Molecular Physics, and Optics
- Spectroscopy

## Fingerprint Dive into the research topics of 'Study of highly excited ro-vibrational states of S<sup>18</sup>O<sub>2</sub> from “hot” transitions: The bands ν<sub>1</sub>+ν<sub>2</sub>+ν<sub>3</sub>−ν<sub>2</sub>, 2ν<sub>1</sub>+ν<sub>2</sub>−ν<sub>2</sub>, and 2ν<sub>2</sub>+ν<sub>3</sub>−ν<sub>2</sub>'. Together they form a unique fingerprint.

## Cite this

^{18}O

_{2}from “hot” transitions: The bands ν

_{1}+ν

_{2}+ν

_{3}−ν

_{2}, 2ν

_{1}+ν

_{2}−ν

_{2}, and 2ν

_{2}+ν

_{3}−ν

_{2}.

*Journal of Quantitative Spectroscopy and Radiative Transfer*,

*196*, 159-164. https://doi.org/10.1016/j.jqsrt.2017.04.004