Characterisation of the b3Σ+, v = 0 state and its interaction with the A1Π state in aluminium monofluoride
| Autor: | Gerard Meijer, Stefan Truppe, Silvio Marx, Hanns Christian Schewe, Jesús Pérez-Ríos, Simon Hofsäss, Sebastian Kray, Boris G. Sartakov, Nicole Walter, Maximilian Doppelbauer |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
010304 chemical physics Biophysics Trapping State (functional analysis) Spin–orbit interaction 010402 general chemistry Condensed Matter Physics 01 natural sciences Physics - Atomic Physics 0104 chemical sciences chemistry.chemical_compound chemistry Physics - Chemical Physics Laser cooling 0103 physical sciences Aluminium monofluoride Level structure Physics::Atomic Physics Physical and Theoretical Chemistry Atomic physics Molecular Biology |
| Zdroj: | Molecular Physics. 119:e1810351 |
| ISSN: | 1362-3028 0026-8976 |
| Popis: | Recently, we determined the detailed energy level structure of the $X^1\Sigma^+$, $A^1\Pi$ and $a^3\Pi$ states of AlF that are relevant to laser cooling and trapping experiments. Here, we investigate the $b^3\Sigma^+, v=0$ state of the AlF molecule. A rotationally-resolved (1+2)-REMPI spectrum of the $b^3\Sigma^+, v'=0 \leftarrow a^3\Pi, v''=0$ band is presented and the lifetime of the $b^3\Sigma^+, v=0$ state is measured to be 190(2)~ns. Hyperfine-resolved, laser-induced fluorescence spectra of the $b^3\Sigma^+, v'=0 \leftarrow X^1\Sigma^+, v''=1$ and the $b^3\Sigma^+, v'=0 \leftarrow a^3\Pi, v''=0$ bands are recorded to determine fine- and hyperfine structure parameters. The interaction between the $b^3\Sigma^+, v=0$ and the nearby $A^1\Pi$ state is studied and the magnitude of the spin-orbit coupling between the two electronic states is derived using three independent methods to give a consistent value of 10(1)~cm$^{-1}$. The triplet character of the $A$ state causes an $A\rightarrow a$ loss from the main $A-X$ laser cooling cycle below the 10$^{-6}$ level. Comment: 22 pages, 8 figures |
| Databáze: | OpenAIRE |
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