High-Resolution Study of the Perturbation in the CO Triplet Band

✍ Scribed by M. Momona; H. Kanamori; K. Sakurai

• Book ID: 102972855
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 687 KB
• Volume: 159
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1099

✦ Synopsis

Seven hundred absorption lines have been observed in the discharge plasma of (\mathrm{He}) and (\mathrm{CO}) in the (12600-12800 \mathrm{~cm}^{-1}) region with Doppler-limited resolution by a near-infrared diode laser spectrometer. Out of complex spectral patterns, more than 400 lines were assigned to the (C O) triplet band, (d^{3} \Delta\left(v^{\prime}=2\right)-a^{3} \Pi\left(v^{\prime \prime}=1\right)). The upper state of this transition is known to be severely perturbed. The measurement of all the spin subbands of the ({ }^{3} \Delta_{-}{ }^{3}[I) transition allowed us to reanalyze the perturbation of the (d^{3} \Delta(v=2)) state with the highly vibrationally excited state, (v=9), in the (a^{3} \Pi l) state. Diode laser spectroscopy with high sensitivity and Doppler-limited resolution revealed the overtone band transition from (v=1) to (v=9) within the (a^{3} I I) state and the A-type doubling in the (d^{3} \Delta) state. Those interesting phenomena can be understood as a result of the perturbation and were successfully reproduced by the eigenvectors determined in this analysis. Ci 1993 Academic Press. Inc