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 Title: Extensive Frequency Comb Velocity Modulation Spectroscopy Of Thf+ For Use In The Jila Electron Edm Experiment Author(s): Gresh, Dan Contributor(s): Cornell, Eric; Ye, Jun; Cossel, Kevin Subject(s): Mini-symposium: Beyond the Mass-to-Charge Ratio: Spectroscopic Probes of the Structures of Ions Abstract: The metastable $^3\Delta_1$ state in trapped HfF$^+$ is being used for an ongoing measurement of the electron electric dipole moment (eEDM)\footnote{H. Loh, K. C. Cossel, M. C. Grau, K.-K. Ni, E. R. Meyer, J. L. Bohn, J. Ye, E. A. Cornell, Science 342, 1220 (2013).}. ThF$^+$, which has a larger effective electric field and a longer-lived $^3\Delta_1$ state, offers increased sensitivity for an eEDM measurement. Recently, the Heaven group has spectroscopically studied the low-lying states of ThF$^+$ \footnote{B. J. Barker, I. O. Antonov, M. C. Heaven, K. A. Peterson, J. Chem. Phys. 136, 104305 (2012).}. However, to date there is no detailed information available about technically-accessible laser transitions in the near-infrared region of the spectrum, which are necessary for state preparation and detection in an eEDM experiment. By applying the technique of frequency comb velocity modulation spectroscopy (VMS)\footnote{L. C. Sinclair, K. C. Cossel, T. Coffey, J. Ye, E. A. Cornell, PRL 107, 093002 (2011).} to ThF$^+$ we can acquire 150 cm$^{-1}$ of continuous, ion-sensitive spectra with 150 MHz resolution in 25 minutes. Here, we report on extensive broadband, high-resolution survey spectroscopy of ThF$^+$ in the near-IR where we have observed and accurately fit several rovibronic transitions. In addition, we have observed and characterized numerous rovibronic transitions from an unknown thoriated species of molecular ions. Issue Date: 2014-06-17 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Gresh, D.; Cornell, E.; Ye, J.; Cossel, K. EXTENSIVE FREQUENCY COMB VELOCITY MODULATION SPECTROSCOPY OF ThF+ FOR USE IN THE JILA ELECTRON EDM EXPERIMENT. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.TG15 Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/51141 DOI: https://doi.org/10.15278/isms.2014.TG15 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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