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Wu J, Ma J, Li Y, Liu W, Li P, Sovkov VB. Bichromatic Photoassociation Spectroscopy for the Determination of Rotational Constants of Cs 2 0 u + Long-Range State below the 6S 1/2 + 6P 1/2 Asymptote. Molecules 2020; 25:molecules25173963. [PMID: 32878104 PMCID: PMC7504734 DOI: 10.3390/molecules25173963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 11/26/2022] Open
Abstract
This article demonstrates new observation of the high-resolution ro-vibrational bichromatic photoassociation spectra (BPAS) of Cs2 in the 0u+ long-range state below the asymptotes 6S1/2 + 6P1/2. By combining with a modulation spectroscopic technique, precise references of the frequency differences have been engineered through the BPAS, with which the rotational constants of low-lying vibrational levels of the Cs20u+ long-range state have been accurately determined by fitting the frequency differences to the non-rigid-rotor model. The rotational constants for the newly observed seven ro-vibrational levels are summarized and disagreement for the level ῦ = 498 is clarified. The rotational constants of different vibrational levels demonstrate strong perturbations of the related energy structures. A simple analysis is performed and shows good agreement with experimental results.
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Affiliation(s)
- Jizhou Wu
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China; (J.W.); (Y.L.); (W.L.)
- Collaborative Innovation Center of Extreme Optics, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China
| | - Jie Ma
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China; (J.W.); (Y.L.); (W.L.)
- Collaborative Innovation Center of Extreme Optics, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China
- College of Physics and Electronic Engineering, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China;
- Correspondence: (J.M.); (V.B.S.); Tel.: +86-351-7018-215 (J.M.)
| | - Yuqing Li
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China; (J.W.); (Y.L.); (W.L.)
- Collaborative Innovation Center of Extreme Optics, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China
| | - Wenliang Liu
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China; (J.W.); (Y.L.); (W.L.)
- Collaborative Innovation Center of Extreme Optics, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China
| | - Peng Li
- College of Physics and Electronic Engineering, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China;
| | - Vladimir B. Sovkov
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, 92 Wucheng Road, Taiyuan 030006, China; (J.W.); (Y.L.); (W.L.)
- Department of Photonics, St. Petersburg State University, 7/9 Universitetskaya Nab., 199034 St. Petersburg, Russia
- Correspondence: (J.M.); (V.B.S.); Tel.: +86-351-7018-215 (J.M.)
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