High-Resolution Laser Spectroscopy of ZrN: The (0,0) Band of the A2Π–X2Σ+ Transition

✍ Scribed by A.S-C. Cheung; Haiyang Li; He Jiang; Hongbing Chen

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 131 KB
• Volume: 210
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2001.8456

✦ Synopsis

The A 2 -X 2 + (0,0) band of ZrN between 5620 and 5890 A has been studied using laser polarization, laser-induced fluorescence, and wavelength-resolved fluorescence spectroscopy. All the 12 branches expected from a 2 -2 + transition have been observed and assigned. Both nondegenerate and degenerate perturbations have been found in the = 3/2 component of the A 2 state. For 90 ZrN, nondegenerate perturbations were found at J = 4.5 and 13.5 in the e level and J = 8.5 and 18.5 in the f level of the -doubling components of the A 2 3/2 substate. These perturbations were ascribed to an interaction between the A 2 state and a nondegenerate state, most likely a 4 -state. The degenerate perturbations found at J = 39.5, 44.5, and 56.5 with both -doubling components perturbed to the same extent were consistent with a 2 state as the perturbing state. A least squares fit of ground state combination differences yielded accurate molecular constants for the v = 0 level of the X 2 + state.