New Assignments in the Green and Red Band Systems of the FeH Radical

✍ Scribed by Daniel F. Hullah; Catherine Wilson; Richard F. Barrow; John M. Brown

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 233 KB
• Volume: 192
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1998.7663

✦ Synopsis

The electronic spectrum of FeH in the regions of the 532 nm (green) and 630 nm (red) systems has been investigated using the techniques of dispersed and undispersed laser induced fluorescence. Sixteen lines have been assigned in the ⍀ ϭ 1/2 4 ⍀ ϭ Ϫ1/2 subband of the e 6 ⌸-c 6 ⌺ ϩ transition and term values determined for the previously uncharacterized e 6 ⌸ 1/ 2 spin-orbit component. A further fourteen lines were assigned to the connected ⍀ ϭ 1/2 4 ⍀ ϭ 3/2 subband of the e 6 ⌸-a 6 ⌬ transition and term values for the hitherto uncharacterized a 6 ⌬ 3/ 2 component were determined. A study of the hightemperature spectrum of FeH, recorded previously by McCormack and O'Connor (1), enabled the branches of the ⍀ ϭ 7/2 4 ⍀ ϭ 9/2 subband of the e 6 ⌸-a 6 ⌬ transition to be extended to higher J values. These predictions were confirmed by laser induced fluorescence (LIF) experiments and led to the assignment of 13 additional lines in this subband. The term values for the e 6 ⌸ 7/ 2 and a 6 ⌬ 9/ 2 spin-orbit components were thus extended to higher J values.