Laser Induced Fluorescence Spectrum of the A4Π-X4Σ− (0,0) Band of MoN

✍ Scribed by N.S.K. Sze; A.S.C. Cheung

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 436 KB
• Volume: 173
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1228

✦ Synopsis

The (A^{4} \Pi-X^{4} \Sigma^{-}(0,0)) band of MoN between 5990 and (6350 \AA) has been studied using laser induced fluorescence spectroscopy. In addition to observing the stronger (\Delta \Sigma=0) transitions, the weaker (\Delta \Sigma= \pm 1) transitions have also been recorded and analyzed. The ({ }^{95} \mathrm{Mo}) and ({ }^{97} \mathrm{Mo}) nuclear hyperfine structures (\left(I=\frac{5}{2}\right)) give considerable broadening to the (F_{1}) and (F_{4}) branches with six hyperfine components of a rotational line spread more than (0.1 \mathrm{~cm}^{-1}). The hyperfine linewidths vary with (J) in the manner expected for spin uncoupling from case (\left(a_{\beta}\right)) to case (\left(b_{B J}\right)) in a high multiplicity state. A merged least-squares fit of the present data and the earlier work yielded improved molecular constants of both the (A^{4} \Pi) and (X^{4} \Sigma^{-})states of the seven isotopic molecules. C) 1995 Academic Press. Inc.