The NH${}_2$D hyperfine structure revealed by astrophysical observations

F. Daniel, L. H. Coudert, A. Punanova +8

The 1${}_{11}$-1${}_{01}$ lines of ortho and para--NH${}_2$D (o/p-NH${}_2$D), respectively at 86 and 110 GHz, are commonly observed to provide constraints on the deuterium fractionation in…