The resonance parameters of the tunneling-predissociation levels with the rotation quantum number J = 0. WKB method has been employed to calculate the resonance parameters for states ν = 1–4 of 3³Σ⁻, and to be more accurately, the scattering method is used for 3³Σ⁻ states with ν = 5, 6 and the 2³Π states.

ν	Position (eV)	Width (cm−1)	Lifetime (s)
3 3 Σ −
0	2.45297	1.396 × 10−23	1.521 × 1012
1	2.52746	7.850 × 10−18	2.706 × 106
2	2.59519	5.964 × 10−13	3.560 × 101
3	2.6558	8.742 × 10−9	2.430 × 10−3
4	2.7089	2.820 × 10−5	7.530 × 10−7
5	2.75408	8.470 × 10−3	1.254 × 10−9
6	2.79094	1.164 × 100	9.117 × 10−12
2 3 Π
0	4.5129	4.566 × 100	2.325 × 10−12