Abstract
The emission spectrum of FeCl has been investigated at high resolution in the near infrared. The molecule was excited in a microwave discharge lamp using a mixture of FeCl3 vapor and 4.9 Torr of He, and the spectra were recorded in the 3000-12200 cm(-1) region using a Fourier transform spectrometer. New bands with R heads near 7725, 8149, 8577, 8949, 9319, 9686, and 10 050 cm(-1) have been assigned as the 0-2, 0-1, 0-0, 1-0, 2-0, 3-0, and 4-0 bands (respectively) of a new (4)Delta-(4)Delta system of FeCl. The strong bands of this system consist of four sub-bands assigned as (4)Delta(1/2)-(4)Delta(1/2), (4)Delta(3/2)-(4)Delta(3/2), (4)Delta(5/2)-(4)Delta(5/2), and (4)Delta(7/2)-(4)Delta(7/2). This transition is analogous to the I mum transitions of FeH and FeF. A rotational analysis of a number of bands in each sub-band has been obtained and spectroscopic constants extracted. The lower a(4)Delta state is affected by perturbations from a nearby electronic state, while the excited g(4)Delta state is free from perturbation. This work represents the first observation of a transition involving quartet states of FeCl. (C) 2003 Elsevier Inc. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 261-268 |
| Number of pages | 8 |
| Journal | JOURNAL OF MOLECULAR SPECTROSCOPY |
| Volume | 221 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Oct 2003 |
Keywords
- LYING ELECTRONIC STATES
- DISSOCIATION-ENERGIES
- ROTATIONAL ANALYSIS
- MOLECULAR-BEAM
- FEH MOLECULE
- GAS-PHASE
- SPECTRUM
- IDENTIFICATION
- TRANSITION
- X(6)DELTA(I)