Broadband velocity modulation spectroscopy of ThF for use in a measurement of the electron electric dipole moment
نویسندگان
چکیده
A number of extensions to the Standard Model of particle physics predict a permanent electric dipole moment of the electron (eEDM) in the range of the current experimental limits. Trapped ThF will be used in a forthcoming generation of the JILA eEDM experiment. Here, we present extensive survey spectroscopy of ThF in the 700–1000 nm spectral region, with the 700–900 nm range fully covered using frequency comb velocity modulation spectroscopy. We have determined that the ThF electronic ground state is X D1, which is the eEDM-sensitive state. In addition, we report high-precision rotational and vibrational constants for 14 ThF electronic states, including excited states that can be used to transfer and readout population in the eEDM experiment. 2015 Elsevier Inc. All rights reserved.
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