Observation of far-infrared transitions between excited states of OH
The Astrophysical Journal1985Vol. 296, pp. 149–149
Abstract
In observations of the Kleinmann-Low nebula of Orion the authors have detected 84.42 and 84.60 μm transitions between the 2Π3/2 J = 7/2 and 2Π3/2 J = 5/2 levels of OH with respective fluxes of 1.0×10-17 and 1.4×10-17W cm-2. When compared to 119 μm flux levels of OH discussed by Watson and 163 μm flux levels of these radicals by Viscuso et al., these results suggest appreciable self-absorption of OH line radiation within the nebula. It is probable that the CO emission due to the J = 31→30 rotational transition at 84.411 μm makes a substantial contribution to the observed 84.22 μm flux.
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