University of Illinois Urbana-Champaign

Singlet-triplet Doorway States Of Aluminum Monofluoride

Walter, Nicole

Content Files
MM03_1.pptx
6374.pdf

Permalink

https://hdl.handle.net/2142/116820

Description

Title
Singlet-triplet Doorway States Of Aluminum Monofluoride
Author(s)
Walter, Nicole
Contributor(s)
  • Meijer, Gerard
  • Sartakov, Boris
  • Schewe, Christian
  • Truppe, Stefan
  • Seifert, Johannes
Issue Date
2022-06-20
Keyword(s)
Cold and ultracold molecules
Abstract
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 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 radiative lifetimes of selected hyperfine levels are experimentally determined using 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.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116820
DOI
https://doi.org/10.15278/isms.2022.MM03
Copyright and License Information
Copyright 2022 held by the authors

Owning Collections

Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY