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Chin. Phys. B, 2022, Vol. 31(9): 093301    DOI: 10.1088/1674-1056/ac633a

Spectroscopic study of B2Σ+–X1 2Π1/2 transition of electron electric dipole moment candidate PbF

Ben Chen(陈犇), Yi-Ni Chen(陈旖旎), Jia-Nuan Pan(潘佳煖), Jian-Ping Yin(印建平), and Hai-Ling Wang(汪海玲)
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
Abstract  PbF, a valuable candidate for measuring the electron electric dipole moment (eEDM), is of great significance in measuring its spectrum and deriving its molecular constants in experiment. In the present work, the rovibronic spectrum of the B$^{2}{\Sigma }^{+}$-X$_{1}^{\, 2}{\Pi }_{1/2}$ transition of PbF in a wavelength range of 260 nm-285 nm is studied by the laser ablation/laser induced fluorescence method. The molecular parameters of the X$_{1}^{\, 2}{\Pi }_{1/2}$ (${v''}=0)$ and B$^{2}{\Sigma }^{+}$ (${v}'=0, 1$) states are derived from the recorded spectra of the (0, 0) and (1, 0) bands of the B$^{2}{\Sigma }^{+}$-X$_{1}^{\, 2}{\Pi }_{1/2}$ transition. Also, the Franck-Condon factors (FCFs) of the transitions between the B$^{2}{\Sigma }^{+}$ and X$_{1}^{\, 2}{\Pi }_{1/2}$ states are calculated by the RKR/LEVEL method and the Morse potential method, respectively.
Keywords:  spectroscopic parameters      Franck-Condon factors      an eEDM candidate      lifetime  
Received:  02 February 2022      Revised:  20 March 2022      Accepted manuscript online:  01 April 2022
PACS:  33.15.Pw (Fine and hyperfine structure)  
  33.20.Lg (Ultraviolet spectra)  
  33.20.Vq (Vibration-rotation analysis)  
  33.70.Ca (Oscillator and band strengths, lifetimes, transition moments, and Franck-Condon factors)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11674096 and 11874151).
Corresponding Authors:  Hai-Ling Wang     E-mail:

Cite this article: 

Ben Chen(陈犇), Yi-Ni Chen(陈旖旎), Jia-Nuan Pan(潘佳煖), Jian-Ping Yin(印建平), and Hai-Ling Wang(汪海玲) Spectroscopic study of B2Σ+–X1 2Π1/2 transition of electron electric dipole moment candidate PbF 2022 Chin. Phys. B 31 093301

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