Fourier Transform Emission Spectroscopy of the F2Σ+–X2Σ+ System of RuN

✍ Scribed by R.S. Ram; P.F. Bernath

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 324 KB
• Volume: 213
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2002.8565

✦ Synopsis

Emission spectra of RuN have been recorded at high resolution in the region 12 000-35 000 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 20 721.5 cm -1 have been assigned as the 0-1, 0-0, 1-0, and 2-0 bands of a new 2 + -2 + system with the lower state as the ground state. This transition has been labeled as F 2 + -X 2 + , with the F 2 + state arising from the 1σ 2 2σ 2 1π 4 1δ 4 4σ 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 G(1/2) = 1108.3235( 22) cm -1 , B e = 0.5545023(42) cm -1 , α e = 0.0034468(57) cm -1 , r e = 1.5714269(60) Å, while the equilibrium constants for the excited state are ω e = 946.8471(40) cm -1 , ω e x e = 6.4229( 14) cm -1 , B e = 0.50085(21) cm -1 , α e = 0.00375(10) cm -1 , r e = 1.65345(34) Å. This transition is analogous to the E 2 + -X 2 + system of RhC (W.