Spectroscopic characterization of singlet–triplet doorway states of aluminum monofluoride
| العنوان: | Spectroscopic characterization of singlet–triplet doorway states of aluminum monofluoride |
|---|---|
| المؤلفون: | N. Walter, J. Seifert, S. Truppe, H. C. Schewe, B. G. Sartakov, G. Meijer |
| المصدر: | The Journal of Chemical Physics |
| بيانات النشر: | AIP Publishing, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Quantum Physics, FOS: Physical sciences, General Physics and Astronomy, Physics::Atomic Physics, Physical and Theoretical Chemistry, Quantum Physics (quant-ph) |
| الوصف: | Aluminum monofluoride (AlF) possesses highly favorable properties for laser cooling, both via the A$^1\Pi$ and a$^3\Pi$ states. Determining efficient pathways between the singlet and the triplet manifold of electronic states will be advantageous for future experiments at ultralow temperatures. The lowest rotational levels of the A$^1\Pi, v=6$ and b$^3\Sigma^+, v=5$ states of AlF are nearly iso-energetic and interact via spin-orbit coupling. These levels thus have a strongly mixed spin-character and provide a singlet-triplet doorway. We here present a hyperfine resolved spectroscopic study of the A$^1\Pi, v=6$ // b$^3\Sigma^+, v=5$ perturbed system in a jet-cooled, pulsed molecular beam. From a fit to the observed energies of the hyperfine levels, the fine and hyperfine structure parameters of the coupled states, their relative energies as well as the spin-orbit interaction parameter are determined. The standard deviation of the fit is about 15 MHz. We experimentally determine the radiative lifetimes of selected hyperfine levels by time-delayed ionization, Lamb dip spectroscopy and accurate measurements of the transition lineshapes. The measured lifetimes range between 2 ns and 200 ns, determined by the degree of singlet-triplet mixing for each level. Comment: 12 pages, 11 figures |
| وصف الملف: | application/pdf |
| تدمد: | 1089-7690 0021-9606 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::403f70f97606a57937dd892ba7d19e69 https://doi.org/10.1063/5.0088288 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....403f70f97606a57937dd892ba7d19e69 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 10897690 00219606 |
|---|