Two Emission Band Systems of SeO in the Photographic Infrared
1973; NRC Research Press; Volume: 51; Issue: 20 Linguagem: Inglês
10.1139/p73-282
ISSN1208-6045
Autores Tópico(s)Solid-state spectroscopy and crystallography
ResumoTwo emission band systems of SeO consisting of 46 bands degraded to longer wavelengths have been observed for the first time in the spectral region 10 780–9490 Å. The vibrational analysis of one system which consists of several double-headed bands shows that it arises from the forbidden transition b 1 Σ + –X 3 Σ − . The double-headed bands have been analyzed as belonging to the 1 Σ + –X 3 Σ − (F 1 ) and 1 Σ + –X 3 Σ − (F 2 ,F 3 ) subsystems. The separations between the corresponding band heads of these two subsystems are consistent with the expected value of ~ 2λ, λ(= 86.4 cm −1 ) being the spin splitting constant of the X 3 Σ − state derived previously from a detailed rotational analysis of the B 3 Σ − –X 3 Σ − (denoted earlier as the A 3 Σ − –X 3 Σ − ) system. The vibrational assignments are confirmed by the observed isotope band heads of 82 SeO, 80 SeO, 78 SeO, and 76 SeO. The second band system, which consists of a single sequence of bands in the region 10 780–10 500 Å, is tentatively assigned to the probable forbidden transition (a 1 Δ)–(X 3 Σ − ).
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