On the frequency of NH+ and ND | Astronomy & Astrophysics (A&A)

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Table 3:

Hyperfine components and A_ul Einstein spontaneous emission coefficients of the (J: 2-1) transition of N₂H⁺.
J'	F₁'	$F' \rightarrow J$		F₁	F	Frequency^a	A_ul
2	2	2	1	2	3	186 342.6570	1.354(-5)
2	2	1	1	2	1	186 342.7883	6.530(-5)
2	2	3	1	2	3	186 342.9123	7.739(-5)
2	2	2	1	2	2	186 342.9537	6.046(-5)
2	1	1	1	0	1	186 343.0459	1.935(-4)
2	2	3	1	2	2	186 343.2091	9.674(-6)
2	1	2	1	0	1	186 343.2577	1.935(-4)
2	2	1	1	2	2	186 343.2755	2.177(-5)
2	1	0	1	0	1	186 343.5098	1.935(-4)
2	2	2	1	1	1	186 344.3808	1.959(-4)
2	3	3	1	2	3	186 344.4444	3.870(-5)
2	2	2	1	1	2	186 344.5158	6.530(-5)
2	2	1	1	1	1	186 344.7026	1.088(-4)
2	3	3	1	2	2	186 344.7412	3.096(-4)
2	3	2	1	2	1	186 344.7615	2.925(-4)
2	2	3	1	1	2	186 344.7711	2.612(-4)
2	2	1	1	1	2	186 344.8375	7.255(-6)
2	3	4	1	2	3	186 344.8419	3.483(-4)
2	3	2	1	2	3	186 344.9519	1.548(-6)
2	2	1	1	1	0	186 345.1343	1.451(-4)
2	3	2	1	2	2	186 345.2487	5.417(-5)
2	1	1	1	2	1	186 345.3441	2.418(-6)
2	1	2	1	2	1	186 345.5559	9.674(-8)
2	1	2	1	2	3	186 345.7462	8.126(-6)
2	1	0	1	2	1	186 345.8080	9.674(-6)
2	1	1	1	2	2	186 345.8312	7.256(-6)
2	1	2	1	2	2	186 346.0430	1.451(-6)
2	1	1	1	1	1	186 347.2584	3.628(-5)
2	1	1	1	1	2	186 347.3933	6.046(-5)
2	1	2	1	1	1	186 347.4701	3.628(-5)
2	1	2	1	1	2	186 347.6050	1.088(-4)
2	1	1	1	1	0	186 347.6901	4.837(-5)
2	1	0	1	1	1	186 347.7222	1.451(-4)

^a The frequency uncertainty is $\pm$ 2.3 kHz for all hyperfine components.

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