High-resolution spectroscopy of the X 0⁺→ A0⁺, C0⁺ transitions of PbO in 22 300–25 100 cm⁻¹
Creators
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1.
University of Toyama
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2.
California Institute of Technology
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3.
Okayama University
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4.
Kyoto University
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5.
Kobe University
Abstract
High-resolution excitation spectra of the X 0 + → A 0 + and X 0 + → C 0 + transitions of lead monoxide (PbO) are observed in a range of 22 300-25 100 cm−1. Transition frequencies are determined with an average uncertainty of 8 . 5 × 1 0 − 4 cm−1 by comparing with resonances of an ultralow expansion etalon. PbO molecules are produced by laser ablation in a cold helium buffer gas, which provides rotationally cold but vibrationally hot molecules and allows observation of hot bands of excitation from the υ ′ ′ = 1 , 2 vibrational states. Spectroscopic constants and potential curves for the A 0 + and C 0 + states are determined, and the spectroscopic constants obtained for the three main isotopologues are reproduced to a satisfactory level using a single potential curve for each electronic state. This indicates that perturbation due to other electronic states is negligibly small.
Copyright and License
© 2022 Elsevier Inc. All rights reserved.
Acknowledgement
We acknowledge S. Shiraishi and T. Tojo for their assistance to the experiment and S. Kuma for fruitful discussion. This work was supported by JSPS, Japan KAKENHI Grant No. JP20K03805 and JP22H01249 and by the Toray Science Foundation
Contributions
Katsunari Enomoto: Conceptualization, Formal analysis, Writing – original draft, Funding acquisition. Ai Nakano: Investigation, Visualization. Takehiro Suzuki: Investigation, Software. Kaori Kobayashi: Conceptualization, Writing – review & editing. Yuiki Takahashi: Conceptualization, Writing – review & editing. Yuki Miyamoto: Conceptualization, Writing – review & editing, Funding acquisition. Masaaki Baba: Conceptualization, Writing – review & editing.
Supplemental Material
- MMC S1. List of the resonance lines of PbO.
Files
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Additional details
Funding
- Japan Society for the Promotion of Science
- JP20K03805
- Japan Society for the Promotion of Science
- JP22H01249
- Toray Science Foundation
Dates
- Accepted
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2022-10-28Accepted
- Available
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2022-11-03Published online
- Available
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2022-11-12Version of Record online