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Xilin Bai, Youlong Wang, Timothy Steimle. Laser-induced fluorescence spectroscopy of uranium monofluoride[J]. Chinese Journal of Chemical Physics .
Citation: Xilin Bai, Youlong Wang, Timothy Steimle. Laser-induced fluorescence spectroscopy of uranium monofluoride[J]. Chinese Journal of Chemical Physics .

Laser-induced fluorescence spectroscopy of uranium monofluoride

  • Received Date: 2021-01-14
  • Accepted Date: 2021-03-11
  • Rev Recd Date: 2021-02-19
  • Available Online: 2021-03-26
  • The laser-induced fluorescence excitation spectra of UF have been recorded in the range of 17000−19000 cm-1 using two-dimensional spectroscopy. High resolution dispersed fluorescence spectra and fluorescence decay curves time-resolved fluorescence spectroscopy were also recorded. Three rotationally resolved bands have been intensively analyzed, and all bands were found to be derived from the ground state X(1)4.5 with a rotational constant of 0.23421 cm-1. The low-lying electronic states have been observed near 435 and 651 cm-1 in the dispersed fluorescence spectra, which were assigned as Ωʹ = 3.5, and 2.5, respectively. The vibrational constants for the X(1)4.5 and X(1)3.5 states have been calculated. The branching ratios of the dispersed fluorescence spectra for the [18.62]3.5, [17.72]4.5, and [17.65]4.5 states were reported. Radiative lifetimes of 332(9), 825(49), and 433(15) ns for the [18.62]3.5, [17.72]4.5, and [17.65]4.5 states were obtained by fitting the fluorescence decay curves time-resolved fluorescence spectroscopy, respectively. Transition dipole moments were performed using the branching ratios and the radiative lifetimes.

     

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