Spectroscopy on the AΠ1←XΣ+1 transition of buffer-gas-cooled AlCl
| Autor: | Taylor N. Lewis, Boerge Hemmerling, Kayla Rodriguez, Brian K. Kendrick, Alexander Teplukhin, Christopher J. Bardeen, John R. Daniel, Chen Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Absorption spectroscopy Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Bond length chemistry Ab initio quantum chemistry methods Laser cooling 0103 physical sciences Absorption (logic) 010306 general physics 0210 nano-technology Spectroscopy Helium Equilibrium constant |
| Zdroj: | Physical Review A. 104 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.104.012801 |
| Popis: | Aluminum monochloride (AlCl) has been proposed as an excellent candidate for laser cooling. Here we present absorption spectroscopy measurements on the $A^{1}\mathrm{\ensuremath{\Pi}}\ensuremath{\leftarrow}{X}^{1}{\mathrm{\ensuremath{\Sigma}}}^{+}$ transition in AlCl inside a cryogenic helium buffer-gas beam cell. The high-resolution absorption data enable a rigorous, quantitative comparison with our high-level ab initio calculations of the electronic and rovibronic energies, providing a comprehensive picture of the AlCl quantum structure. The combination of high-resolution spectral data and theory permits the evaluation of spectroscopic constants and associated properties, like equilibrium bond length, with an order of magnitude higher precision. Based on the measured molecular equilibrium constants of the $A^{1}\mathrm{\ensuremath{\Pi}}$ state, we estimate a Franck-Condon factor of the $A^{1}\mathrm{\ensuremath{\Pi}}\ensuremath{\leftarrow}{X}^{1}{\mathrm{\ensuremath{\Sigma}}}^{+}$ of 99.88%, which confirms that AlCl is amenable to laser cooling. |
| Databáze: | OpenAIRE |
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