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  Hyperfine resolved optical spectroscopy of the A2Π ←X2Σ+ transition in MgF

Doppelbauer, M., Wright, S., Hofsäss, S., Sartakov, B. G., Meijer, G., & Truppe, S. (2022). Hyperfine resolved optical spectroscopy of the A2Π ←X2Σ+ transition in MgF. The Journal of Chemical Physics, 156(13): 134301. doi:10.1063/5.0081902.

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 Creators:
Doppelbauer, Maximilian1, Author           
Wright, Sidney1, Author           
Hofsäss, Simon1, Author           
Sartakov, B. G.2, Author
Meijer, Gerard1, Author           
Truppe, Stefan1, Author           
Affiliations:
1Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              
2General Physics Institute, Russian Academy of Sciences, avilovstreet 38, 119991 Moscow, Russia, ou_persistent22              

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Free keywords: Physics, Atomic Physics, physics.atom-ph, Physics, Chemical Physics, physics.chem-ph
 Abstract: We report on hyperfine-resolved laser spectroscopy of the A2Π ←X2Σ+ transition of MgF, relevant for laser cooling. We recorded 25
rotational transitions with an absolute accuracy of better than 20 MHz,
assigned 56 hyperfine lines and determined precise rotational, fine and
hyperfine structure parameters for the A2Π state. The radiative lifetime
of the A2Π state was determined to be 7.2(3) ns, in good agreement with
\textit{ab initio} calculations. The transition isotope shift between bosonic
isotopologues of the molecule is recorded and compared to predicted values
within the Born-Oppenheimer approximation. We measured the Stark effect of
selected rotational lines of the A2Π ←X2Σ+ transition
by applying electric fields of up to 10.6 kV cm-1 and determined the
permanent electric dipole moments of 24MgF in its ground X2Σ+ and
first excited A2Π states to be μX=2.88(20) D and μA=3.20(22) D,
respectively. Based on these measurements, we caution for potential losses from
the optical cycling transition, due to electric field induced parity mixing in
the excited state. In order to scatter 104 photons, the electric field must
be controlled to below 1 V cm-1.

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Language(s): eng - English
 Dates: 2021-12-132021-12-102022-03-152022-04-012022-04-07
 Publication Status: Published in print
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2112.06555
DOI: 10.1063/5.0081902
 Degree: -

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Project name : CoMoFun - Cold Molecules for Fundamental Physics
Grant ID : 949119
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: The Journal of Chemical Physics
  Abbreviation : J. Chem. Phys.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Institute of Physics
Pages: 13 Volume / Issue: 156 (13) Sequence Number: 134301 Start / End Page: - Identifier: ISSN: 0021-9606
CoNE: https://pure.mpg.de/cone/journals/resource/954922836226