Fine and hyperfine interactions in ${}^{171}$YbOH and ${}^{173}$YbOH

Abstract

The odd isotopologues of ytterbium monohydroxide, ${}^{171,173}$YbOH, have been identified as promising molecules in which to measure parity (P) and time reversal (T) violating physics. Here we characterize the ${\tilde{A}}^2{\Pi }_{1/2}(0,0,0)-{\tilde{X}}^2{\Sigma }^{+}(0,0,0)$ band near 577 nm for these odd isotopologues. Both laser-induced fluorescence (LIF) excitation spectra of a supersonic molecular beam sample and absorption spectra of a cryogenic buffer-gas cooled sample were recorded. Additionally, a novel spectroscopic technique based on laser-enhanced chemical reactions is demonstrated and utilized in the absorption measurements. This technique is especially powerful for disentangling congested spectra. An effective Hamiltonian model is used to extract the fine and hyperfine parameters for the ${\tilde{A}}^2{\Pi }_{1/2}(0,0,0)$ and ${\tilde{X}}^2{\Sigma }^{+}(0,0,0)$ states. A comparison of the determined ${\tilde{X}}^2{\Sigma }^{+}(0,0,0)$ hyperfine parameters with recently predicted values (M. Denis, et al., J. Chem. Phys. $152$, 084303 (2020), K. Gaul and R. Berger, Phys. Rev. A $101$, 012508 (2020), J. Liu et al., J. Chem. Phys. $154$, 064110 (2021)) is made. The measured hyperfine parameters provide experimental confirmation of the computational methods used to compute the P,T-violating coupling constants $W_d$ and $W_M$, which correlate P,T-violating physics to P,T-violating energy shifts in the molecule. The dependence of the fine and hyperfine parameters of the ${\tilde{A}}^2{\Pi }_{1/2}(0,0,0)$ and ${\tilde{X}}^2{\Sigma }^{+}(0,0,0)$ states for all isotopologues of YbOH are discussed and a comparison to isoelectronic YbF is made.

54 pages, 7 figures

References in corpus (13)

• Precision Measurement of Time-Reversal Symmetry Violation with Laser-Cooled Polyatomic Molecules
• Using Molecules to Measure Nuclear Spin-Dependent Parity Violation
• Laser-Cooled Polyatomic Molecules for Improved Electron Electric Dipole Moment Searches
• Spectroscopy of short-lived radioactive molecules: A sensitive laboratory for new physics
• Polyatomic Molecules as Quantum Sensors for Fundamental Physics
• Time-reversal symmetry violation in molecules induced by nuclear magnetic quadrupole moments
• New Limit on the Permanent Electric Dipole Moment of ${}^{129}$Xe using ${}^3$He Comagnetometry and SQUID Detection
• Enhancement factor for the electric dipole moment of the electron in the BaOH and YbOH molecules
• Methods for measuring the electron EDM using ultracold YbF molecules
• Enhanced Yield from a Cryogenic Buffer Gas Beam Source via Excited State Chemistry
• Probing low-mass vector bosons with parity nonconservation and nuclear anapole moment measurements in atoms and molecules
• Enhanced $\mathcal{P},\mathcal{T}$-violating nuclear magnetic quadrupole moment effects in laser-coolable molecules
• The metastable Q ${}^3{\Delta }_2$ state of ThO: A new resource for the ACME electron EDM search

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• Electronic matrix elements for parity doubling in YbOH molecule
• Measuring the nuclear magnetic quadrupole moment of optically trapped ytterbium atoms in the metastable state
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