Electronic Singlet States of Scandium Monochloride

✍ Scribed by F. Taher; C. Effantin; A. Bernard; J. d'Incan; E.A. Shenyavskaya; J. Vergès

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 200 KB
• Volume: 179
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.0200

✦ Synopsis

We present the results of a study of singlet transitions of scandium monochloride, corresponding to (i) the developed red C(2) 1 S / r X 1 S / and infrared B(1) 1 P r X 1 S / systems observed in thermal emission, (ii) fluorescence from (3) 1 P to B(1) 1 P and from (3) 1 S / to B(1) 1 P, following excitation by Ar / laser lines 476.5 or 457.9 nm. Transitions belonging to both isotopic molecules 45 Sc 35 Cl and 45 Sc 37 Cl have been observed, and spectra have been recorded with a Fourier transform spectrometer. We give values of the effective molecular constants for a number of vibrational levels in five electronic states as they result from an overall fit of the experimental data for each isotopomer (some 5400 line wavenumbers are reproduced with a standard deviation of 0.006 cm 01 ). The (3) 1 S / state is characterized for the first time, in the £ Å 0 level. Local rotational perturbations are observed in the first five vibrational levels of B(1) 1 P.