Fourier transform emission spectroscopy of the F-2 Sigma+-X-2 Sigma+ system of RuN

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Abstract

Emission spectra of RUN have been recorded at high resolution in the region 12000-35000 cm(-1) using a Fourier transform spectrometer. The molecules were excited in a ruthenium hollow cathode lamp in the presence of about 2.5 Torr of Ne and 5 m Torr of N-2. New bands with origins near 17 758.1, 18 866.4, 19 800.4 and 20721.5 cm(-1) have been assigned as the 0-1, 0-0, 1-0, and 2-0 bands of a new (2)Sigma(+)-(2)Sigma(+) system with the lower state as the ground state. This transition has been labeled as F(2)Sigma(+)-X(2)Sigma(+), with the F(2)Sigma(+) state arising from the 1sigma(2)2sigma(2)1pi(4)1delta(4)4sigma(1) configuration. A rotational analysis of these bands has been carried out and spectroscopic constants have been extracted. The principal equilibrium constants for the ground state of RUN are DeltaG(1/2)" = 1108.3235(22) cm(-1), B-e" = 0.5545023(42) cm(-1), alpha(c)" = 0.0034468(57) cm(-1), r(c)(") = 1.5714269(60) Angstrom, while the equilibrium constants for the excited state are omega(c)' = 946.8471(40) cm(-1), omega(e)x(c)' = 6.4229(14) cm(-1), B-e' = 0.50085(21) cm(-1), alpha(c)' = 0.00375(10) cm(-1), r(c)' = 1.65345(34) Angstrom. This transition is analogous to the E(2)Sigma(+)-X(2)Sigma(+) system of RhC (W. J. Balfour et al., J. Mol. Spectrose. 198, 393 (1999)). (C) 2002 Elsevier Science (USA).

Original languageEnglish
Pages (from-to)170-178
Number of pages9
JournalJOURNAL OF MOLECULAR SPECTROSCOPY
Volume213
Issue number2
DOIs
Publication statusPublished - Jun 2002

Keywords

  • AB-INITIO CALCULATIONS
  • DIATOMIC FEN
  • IDENTIFICATION
  • MONOCARBIDE
  • MOLECULES
  • SPECTRUM
  • RHODIUM
  • STATES
  • BANDS
  • RHC

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