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Fine and hyperfine interactions in ¹⁷¹YbOH and ¹⁷³YbOH

Pilgram, Nickolas H. and Jadbabaie, Arian and Zeng, Yi and Hutzler, Nicholas R. and Steimle, Timothy C. (2021) Fine and hyperfine interactions in ¹⁷¹YbOH and ¹⁷³YbOH. Journal of Chemical Physics, 154 (24). Art. No. 244309. ISSN 0021-9606. doi:10.1063/5.0055293.

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The odd isotopologues of ytterbium monohydroxide, ^(171,173)YbOH, have been identified as promising molecules to measure parity (P) and time reversal (T) violating physics. Here, we characterize the òΠ_(1/2)(0,0,0)−X̃²Σ⁺(0,0,0)òΠ_(1/2)(0,0,0)−X̃²Σ⁺(0,0,0) band near 577 nm for these odd isotopologues. Both laser-induced fluorescence excitation spectra of a supersonic molecular beam sample and absorption spectra of a cryogenic buffer-gas cooled sample were recorded. In addition, a novel spectroscopic technique based on laser-enhanced chemical reactions is demonstrated and used in 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 òΠ_(1/2)(0,0,0)òΠ_(1/2)(0,0,0) and X̃²Σ⁺(0,0,0)X̃²Σ⁺(0,0,0) states. A comparison of the determined X̃²Σ⁺(0,0,0)X̃²Σ⁺(0,0,0) hyperfine parameters with recently predicted values [Denis et al., J. Chem. Phys. 152, 084303 (2020); K. Gaul and R. Berger, Phys. Rev. A 101, 012508 (2020); and 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 òΠ_(1/2)(0,0,0)òΠ_(1/2)(0,0,0) and X̃²Σ⁺(0,0,0)X̃²Σ⁺(0,0,0) states for all isotopologues of YbOH are discussed, and a comparison to isoelectronic YbF is made.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Pilgram, Nickolas H.0000-0002-5467-3783
Jadbabaie, Arian0000-0002-7606-5586
Zeng, Yi0000-0003-0549-6060
Hutzler, Nicholas R.0000-0002-5203-3635
Steimle, Timothy C.0000-0002-5859-9461
Alternate Title:Fine and hyperfine interactions in 171YbOH and 173YbOH
Additional Information:© 2021 Published under an exclusive license by AIP Publishing. Submitted: 27 April 2021; Accepted: 7 June 2021; Published Online: 29 June 2021. The research at Arizona State University and Caltech was supported by grants from the Heising–Simons Foundation (ASU: Grant No. 2018-0681; Caltech: Grant No. 2019-1193). N.R.H. acknowledges support from the NIST Precision Measurement (Grant No. 60NANB18D253) and the NSF CAREER Award (Grant No. PHY-1847550). We thank Graceson Aufderheide and Richard Mawhorter (Physics and Astronomy Department, Pomona College, Pomona, CA 91711, USA) for assistance with Yb + Te(OH)6 target fabrication, Phelan Yu for help fabricating the Yb + Yb(OH)3 targets, and Dr. Anh Le (Chemistry Dept., Georgia Institute of Technology, Atlanta, GA 30318, USA) for assistance in recording the molecular beam spectra. We thank Ben Augenbraun and Phelan Yu for feedback on the article.
Funding AgencyGrant Number
Heising-Simons Foundation2018-0681
Heising-Simons Foundation2019-1193
National Institute of Standards and Technology (NIST)60NANB18D253
Issue or Number:24
Record Number:CaltechAUTHORS:20210526-152350185
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109261
Deposited By: George Porter
Deposited On:26 May 2021 23:10
Last Modified:05 Jul 2022 16:40

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