Identification of New Low-Lying Electronic States of the FeF Radical

✍ Scribed by Stephen M. Kermode; John M. Brown

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 187 KB
• Volume: 213
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2002.8564

✦ Synopsis

Dispersed fluorescence studies on the 6 -X 6 and 6 -X 6 systems of the FeF radical have resulted in the observation of vibrational progressions for transitions to the X 6 state as well as at least two previously unobserved electronic states about 5000 cm -1 above the ground state. The states are assigned as the A 6 and B 6 + electronic states. The spin components of both electronic states were found to be heavily perturbed resulting in uneven splittings between them. A third, weak series was also observed but could not be assigned. The (0,0) band of the 6 7/2 -B 6 + 5/2 transition at 398 nm was observed in absorption by laser induced fluorescence and its rotational structure was assigned. The spectra obtained were weak because of a poor population of the B 6 + state by the reaction used to form FeF. The levels were found to be markedly perturbed at high J values. Attempts were made to fit the data on the 6 7/2 -B 6 + 5/2 system to an effective Hamiltonian, but the presence of perturbations meant that the system is not well described by such a model.