Berlin 2014 – scientific programme
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MO: Fachverband Molekülphysik
MO 7: Experimental Techniques 1
MO 7.4: Talk
Tuesday, March 18, 2014, 11:15–11:30, BEBEL SR144
The microwave spectrum of the odd isotope of ytterbium fluoride,171YbF — •Jens-Uwe Grabow1, Zachary Glassman2, Richard J Mawhorter2, Anh Le3, and Timothy C. Steimle3 — 1Gottfried-Wilhelm-Leibniz-Universität, Hannover, Germany — 2Pomona College, Claremont CA, USA — 3Arizona State University, Tempe AZ, USA
Recent interest in the properties of ytterbium monofluoride, YbF, is primarily motivated by parity non-conservation (PNC) studies, and particularly the determination of electric dipole moment (e-EDM) of the electron, de. The advantages of utilizing heavy metal containing polar molecules like YbF for PNC measurements were recognized approximately 40 years ago and primarily stem from the very large obtainable internal electric fields, Eint, and the closeness of levels with opposite parity. The latter implies that the molecule can be fully polarized under application of a modest external field and the internal field realized is near the Eint value.
The pure rotational spectrum of a minor isotopologue of ytterbium fluoride, 171YbF, in the X2S+ (v=0) state has been recorded using Fourier transform microwave (FT-MW) spectroscopy and pump/probe microwave optical double resonance (PPMODR) spectroscopy. The spectra were analyzed to produce an improved set of fine and hyperfine parameters for 171YbF. Isotopic relationships and the determined 171YbF parameters are used to predict the pure parameters and rotational transition frequency of 173YbF.