Mass-independent analysis of the stable isotopologues of gas-phase titanium monoxide -- TiO
Autor: | Breier, Alexander A., Waßmuth, Björn, Fuchs, Guido W., Gauss, Jürgen, Giesen, Thomas F. |
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Rok vydání: | 2021 |
Předmět: | |
Zdroj: | Journal of Molecular Spectroscopy 355 (2019) 46-58 |
Druh dokumentu: | Working Paper |
DOI: | 10.1016/j.jms.2018.11.006 |
Popis: | More than 130 pure rotational transitions of $^{46}$TiO, $^{47}$TiO, $^{48}$TiO, $^{49}$TiO, $^{50}$TiO, and $^{48}$Ti$^{18}$O are recorded using a high-resolution mm-wave supersonic jet spectrometer in combination with a laser ablation source. For the first time a mass-independent Dunham-like analysis is performed encompassing rare titanium monoxide isotopologues, and are compared to results from high-accuracy quantum-chemical calculations. The obtained parametrization reveals for titanium monoxide effects due to deviations from the Born-Oppenheimer approximation. Additionally, the dominant titanium properties enable an insight into the electronic structure of TiO by analyzing its hyperfine interactions. Further, based on the mass-independent analysis, the frequency positions of the pure rotational transitions of the short lived rare isotopologue $^{44}$TiO are predicted with high accuracy, i.e., on a sub-MHz uncertainty level. This allows for dedicated radio-astronomical searches of this species in core-collapse environments of supernovae. Comment: 29 pages, 3 figures |
Databáze: | arXiv |
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