The low-lying electronic state of FeC observed 3 460 cm−1 above

The Electronic Spectrum of Jet-Cooled FeC in the Visible Region

“…In the LIF excitation spectra measured in this work, many vibronic levels were observed in addition to those previously reported (6,8,9). Figure 1 shows the overall energy level structure in the region 15 000 to 24 000 cm −1 .…”

“…The levels newly observed in this work are marked with solid lines. The levels observed in the previous works (6,8,9) are marked with dashed lines.…”

“…While the electronic spectra of the 3d transition metal oxides have been studied extensively, very little has been published on the 3d transition metal carbides. The gas phase spectroscopic studies have been published only for FeC (6)(7)(8)(9) and CoC (10,11). The electronic spectrum of FeC is complicated due to many perturbations, as has been found in the later 3d transition metal oxides such as FeO (12,13) and CoO (14).…”

Near-Infrared Diode Laser Spectroscopy of FeC in the 0.8-μm Region: A Simultaneous Analysis of the X3Δi and [3.8]1Δ States

“…Addition of H 2 was found to double the observed line intensity of FeC. On the other hand, CH 4 was not necessary to produce FeC and its addition only increased discharge noise seriously. The CO molecules were also produced by the decomposition of Fe(CO) 5 and gave strong spectral lines in the whole region observed in the present study.…”

“…About 10 mJ pulses of a KrF excimer laser (Lambda Physik, COMPex 102; 248 nm) were focused onto a rotating iron rod. The resulting metal plasma was entrained in a mixture of 3% CH 4 in He produced by a pulsed valve operating at a backing pressure of about 3 atm. To measure the DF spectra, the excitation laser was fixed at a region of strong fluorescence within the band of interest, and then the grating of a monochromator (Nikon, G250, or G500) was scanned.…”