Fluorescence Spectroscopy Detection Of The 4f−1 States Of Ybf

Persinger, Thomas D.

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https://hdl.handle.net/2142/116817 Copy

Description

Title

Fluorescence Spectroscopy Detection Of The 4f−1 States Of Ybf

Author(s)

Persinger, Thomas D.

Contributor(s)

• Heaven, Michael
• Steimle, Timothy
• Han, Jiande

Issue Date

2022-06-20

Keyword(s)

Cold and ultracold molecules

Abstract

A measurement of the electron electric dipole moment (eEDM) might be achieved using ytterbium fluoride (YbF) under ultra-cold conditions. One-dimensional laser cooling using the A$^{2}\Pi_{1/2}$ - X$^{2}\Sigma^{+}$ transition of YbF has been demonstrated, but it appears that laser cooling by means of this transition may be limited by radiative loss of population from the cooling cycle. YbF has low-energy states that arise from the Yb$^{+}$(4f$^{13}$6s)F$^{-}$ configuration (labeled in previous papers as 4f$^{-1}$ states). Recent theoretical calculations$^{1}$ predict that radiative decay from A$^{2}\Pi_{1/2}$ to the 4f$^{-1}$ states occurs with a branching fraction of approximately 5x10$^{-4}$, which may explain why attempts to achieve 3-dimensional cooling have not been successful to date. In the present study we have used dispersed laser induced fluorescence spectroscopy to the observe the lowest energy 4f$^{-1}$ states. These measurements were carried out using excitation of previously unobserved YbF transitions in the near UV spectral range. The 4f$^{-1}$ $\Omega$ = 1/2 and 3/2 states were found at energies of 8470 and 9070 cm$^{-1}$ above the ground state. The results are in excellent agreement with the calculations, bolstering confidence in the predicted electric transition dipole moments of Ref. 1. \\ \\ \noindent 1. Zhang, C.; Zhang C.; Cheng, L.; Steimle T. C.; Tarbutt M. R., Inner-shell excitation in the YbF molecule and its impact on laser cooling. Accepted for publication, J. Mol. Spec. (2022) and arXiv.org, e-Print Archive, Physics (2022), 1-11

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116817&&

DOI

https://doi.org/10.15278/isms.2022.MM02

Copyright and License Information

Copyright 2022 held by the authors

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