Answers are grounded in this paper and cite their sources.
We have unsuccessfully searched for the AF = 0 A-doublet transitions of the 211312, J = 3/2 state of OD. The resulting upper limit of the OD/OH column density ratio is 1/400. Subject headings: abundances - molecules, interstellar - radio lines
No takes yet. Share an insight, caveat, or question.
Allen et al. (1974) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: