1. N2 B3g-A3u 1(first positive) 0.2-2.5 [81] 0.26
2. N2 C3u-B3g2(second positive) 2.7-4.7 [81] 0.94
3. N2 c04u-X1g Carroll-Yoshino 11.5-14.0 [82-84] 0.18
4. N2 c03u-X1g Worley-Jenkins 11.5-14.0 [82-84] 0.16
5. N2 b1u-X1g Birge-Hopfield I 7.0-13.1 [83-85] 1.14