Sábháilte in:
| Príomhchruthaitheoirí: | , , , , , , , , |
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| Formáid: | Preprint |
| Foilsithe / Cruthaithe: |
2022
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| Ábhair: | |
| Rochtain ar líne: | https://arxiv.org/abs/2201.06830 |
| Clibeanna: |
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| _version_ | 1866911020668157952 |
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| author | Krumins, V. Tamanis, M. Ferber, R. Oleynichenko, A. V. Skripnikov, L. V. Zaitsevskii, A. Pazyuk, E. A. Stolyarov, A. V. Pashov, A. |
| author_facet | Krumins, V. Tamanis, M. Ferber, R. Oleynichenko, A. V. Skripnikov, L. V. Zaitsevskii, A. Pazyuk, E. A. Stolyarov, A. V. Pashov, A. |
| contents | Laser-induced fluorescence spectra of the $c^3Σ^+(v_{c},J_{c}=N_{c})\rightarrow a^3Σ^+(v_{a},N_{a} = J_{c} \pm 1)$ transitions excited from the ground $X^1Σ^+$ state of $^{39}$K$^{133}$Cs molecule were recorded with Fourier-transform spectrometer IFS125-HR (Bruker) at the highest achievable spectral resolution of 0.0063 cm${}^{-1}$. Systematic study of the hyperfine structure (HFS) of the $a^3Σ^+$ state for levels with $v_{a} \in [0, 27]$ and $N_{a} \in [24, 90]$ shows that the splitting monotonically increases with $v_{a}$. The spectroscopic study was supported by ab initio calculations of the magnetic hyperfine interaction in $X^1Σ^+$ and $a^3Σ^+$ states. The discovered variation of the electronic matrix elements with the internuclear distance $R$ is in a good agreement with the observed $v_{a}$-dependencies of the HFS. Overall set of available experimental data on the $a^3Σ^+$ state was used to improve the potential energy curve particularly near a bottom, providing the refined dissociation energy $D_e$=267.21(1) cm${}^{-1}$. The ab initio HFS matrix elements, combined with the empirical $X^1Σ^+$ and $a^3Σ^+$ PECs in the framework of the invented coupled-channel deperturbation model, reproduce the experimental term values of both ground states within 0.003 cm${}^{-1}$ accuracy up to their common dissociation limit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2201_06830 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | The $a^3Σ^+$ state of KCs revisited: hyperfine structure analysis and potential refinement Krumins, V. Tamanis, M. Ferber, R. Oleynichenko, A. V. Skripnikov, L. V. Zaitsevskii, A. Pazyuk, E. A. Stolyarov, A. V. Pashov, A. Atomic Physics Atomic and Molecular Clusters Chemical Physics Computational Physics Laser-induced fluorescence spectra of the $c^3Σ^+(v_{c},J_{c}=N_{c})\rightarrow a^3Σ^+(v_{a},N_{a} = J_{c} \pm 1)$ transitions excited from the ground $X^1Σ^+$ state of $^{39}$K$^{133}$Cs molecule were recorded with Fourier-transform spectrometer IFS125-HR (Bruker) at the highest achievable spectral resolution of 0.0063 cm${}^{-1}$. Systematic study of the hyperfine structure (HFS) of the $a^3Σ^+$ state for levels with $v_{a} \in [0, 27]$ and $N_{a} \in [24, 90]$ shows that the splitting monotonically increases with $v_{a}$. The spectroscopic study was supported by ab initio calculations of the magnetic hyperfine interaction in $X^1Σ^+$ and $a^3Σ^+$ states. The discovered variation of the electronic matrix elements with the internuclear distance $R$ is in a good agreement with the observed $v_{a}$-dependencies of the HFS. Overall set of available experimental data on the $a^3Σ^+$ state was used to improve the potential energy curve particularly near a bottom, providing the refined dissociation energy $D_e$=267.21(1) cm${}^{-1}$. The ab initio HFS matrix elements, combined with the empirical $X^1Σ^+$ and $a^3Σ^+$ PECs in the framework of the invented coupled-channel deperturbation model, reproduce the experimental term values of both ground states within 0.003 cm${}^{-1}$ accuracy up to their common dissociation limit. |
| title | The $a^3Σ^+$ state of KCs revisited: hyperfine structure analysis and potential refinement |
| topic | Atomic Physics Atomic and Molecular Clusters Chemical Physics Computational Physics |
| url | https://arxiv.org/abs/2201.06830 |