SPECTROSCOPIC CHARATERIZATION OF ThF AND THE LOW-LYING STATES OF ThF$^+$

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Date

2011

Authors

Barker, Beau J.
Antonov, Ivan O.
Heaven, Michael C.

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Ohio State University

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Abstract

Theoretical calculations predict that internal electric fields as high as 90 GV/cm can be attained by polarizing the 3Δ1 state of ThF+, 010502/1 (2008). \textit{"Prospects for an electron electric-dipole moment search in metastable ThO and ThF+"}} Consequently, this ion is of interest for investigation of the dipole moment of the electron. However, spectroscopic data have not been reported previously for ThF or ThF+. We have used laser induced fluorescence and resonantly enhanced two-photon ionization to examine ThF. Multiple electronic transitions were observed in the 19530-21300 \wn range. Rotationally resolved data have been obtained, and the ground state is shown to be X2ΔDouble subscripts: use braces to clarify_3_/_2_3_/_2. Pulsed field ionization - zero electron kinetic energy spectra have been recorded for the ThF+ cation. Vibronic progressions of the X1Σ+ and excited 3Δ states have been identified. The term energy for the 3Δ1 state was found to be T0=330 \wn. Details of the experiments and spectroscopic constants for ThF and ThF+ will be reported.

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Author Institution: Department of Chemistry, Emory University, Atlanta, GA 30322

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