Direct evidence of multiple reservoirs of volatile nitrogen in a protosolar nebula analogue

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Table A.1

Spectroscopic properties and relative intensities (R.I.) of the hyperfine CN and C¹⁵N (NJF → N′J′F′) transitions.

Species	Group	NJ F ^§	N ′ J ′ F ′	Rest frequency	A _ul ^†	g _u ^‡	R.I.^♯
				(MHz)	(s^-1)

CN	b	3 5/2 5/2	2 3/2 5/2	340008.13	6.197 ×10^-5	6	0.054
		3 5/2 3/2	2 3/2 3/2	340019.63	9.270 ×10^-5	4	0.054
		3 5/2 7/2	2 3/2 5/2	340031.55	3.845 ×10^-4	8	0.445
		3 5/2 3/2	2 3/2 1/2	340035.41	2.887 ×10^-4	4	0.167
		3 5/2 5/2	2 3/2 3/2	340035.41	3.231 ×10^-4	6	0.281
	a	3 7/2 7/2	2 5/2 5/2	340247.77	3.797 ×10^-4	8	0.307
		3 7/2 9/2	2 5/2 7/2	340247.77	4.131 ×10^-4	10	0.417
		3 7/2 5/2	2 5/2 3/2	340248.54	3.674 ×10^-4	6	0.222
		3 7/2 5/2	2 5/2 5/2	340261.77	4.479 ×10^-5	6	0.027
		3 7/2 7/2	2 5/2 7/2	340264.95	3.350 ×10^-5	8	0.027
C¹⁵N		3 5/2 2	2 3/2 1	329623.32	3.155 ×10^-4	5	0.159
		3 5/2 3	2 3/2 2	329625.98	3.508 ×10^-4	7	0.247
		3 7/2 3	2 5/2 2	329837.13	3.583 ×10^-4	7	0.253
		3 7/2 4	2 5/2 3	329837.65	3.764 ×10^-4	9	0.341

Notes.

^(§)

Quantum numbers: N is the rotational angular momentum, J = N + 1 / 2 describes the electronic spin coupling, and F = J + I describes the nuclear spin coupling (I = 1 for ¹⁴N, and 1/2 for ¹⁵N).

^(†)

Einstein coefficient for spontaneous radiative decay.

^(‡)

Upper level degeneracy (including fine and hyperfine splitting).

^(♯)

Normalized to a total of unity per fine structure group.

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