Infrared emission spectroscopy of the [10.5](5)Delta-X-5 Delta system of VF

R S Ram, P F Bernath, S P Davis

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The emission spectrum of VF has been investigated in the 3400-17 000 cm(-1) region using a Fourier transform spectrometer. The bands were excited in a high temperature carbon tube furnace from the reaction of vanadium metal vapor with CF4, as well as in a microwave discharge through a flowing mixture of VF4 vapor and helium. Several bands observed in the 9000-12 000 cm(-1) region have been attributed to VF. The bands with high wave number R heads near 9156.8, 9816.4, 10 481.4, 11 035.8, and 11 587.2 cm(-1) have been assigned as the 0-2, 0-1, 0-0, 1-0, and 2-0 bands, respectively, of the new [10.5](5)Delta-X(5)Delta system of VF. A rotational analysis of the (5)Delta(1)-(5)Delta(1), (5)Delta(2)-(5)Delta(2), (5)Delta(3)-(5)Delta(3), and (5)Delta(4)-(5)Delta(4) subbands of the 0-1, 0-0, 1-0, and 2-0 bands has been carried out and spectroscopic parameters for VF have been obtained for the first time. The following equilibrium constants have been determined for the ground state of VF by averaging the constants of the different spin components: DeltaG(1/2)=665.10 cm(-1), B-e=0.3863 cm(-1), alpha(e)=0.0028 cm(-1), and r(e)=1.7758 Angstrom. (C) 2002 American Institute of Physics.

Original languageEnglish
Pages (from-to)7035-7039
Number of pages5
JournalJournal of Chemical Physics
Issue number16
Publication statusPublished - 22 Apr 2002


  • A(1)DELTA
  • SCF

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