| Element | Reference | Configuration | Term | J | E (cm-1) |
% 1st component 2nd component |
|
| NpIV | (84.8) | 5f4 | 5I | 4 | (0) | 81 f4 5I | 9 f4 3H4 |
| NpIV | (84.8) | 5f4 | 5I | 5 | (3 759) | 91 f4 5I | 5 f4 3H4 |
| NpIV | (84.8) | 5f4 | 5I | 6 | (7 038) | 89 f4 5I | 5 f4 3K2 |
| NpIV | (84.8) | 5f4 | 5F | 2 | (8 008) | 36 f4 5F | 13 f4 5G |
| NpIV | (84.8) | 5f4 | 5F | 1 | (9 477) | 81 f4 5F | 13 f4 3D1 |
| NpIV | (84.8) | 5f4 | 5I | 7 | (9 771) | 75 f4 5I | 14 f4 3K2 |
| NpIV | (84.8) | 5f4 | 4 | (10 582) | 16 f4 3G2 | 15 f4 5F | |
| NpIV | (84.8) | 5f4 | 5F | 3 | (11 411) | 70 f4 5F | 8 f4 3G2 |
| NpIV | (84.8) | 5f4 | 5G | 2 | (11 676) | 57 f4 5G | 24 f4 5F |
| NpIV | (84.8) | 5f4 | 5I | 8 | (12 141) | 58 f4 5I | 24 f4 3K2 |
| NpIV | (84.8) | 5f4 | 5S | 2 | (12 426) | 61 f4 5S | 21 f4 3P2 |
| NpIV | (84.8) | 5f4 | 5G | 3 | (12 537) | 64 f4 5G | 10 f4 3G2 |
| NpIV | (84.8) | 5f4 | 5 | (14 876) | 35 f4 5F | 17 f4 3G2 | |
| NpIV | (84.8) | 5f4 | 3K | 6 | (14 904) | 62 f4 3K2 | 23 f4 3K1 |
| NpIV | (84.8) | 5f4 | 5F | 4 | (15 108) | 66 f4 5F | 13 f4 5G |
| NpIV | (84.8) | 5f4 | 3L | 7 | (16 100) | 50 f4 3L | 18 f4 5I |
| NpIV | (84.8) | 5f4 | 5G | 4 | (17 423) | 59 f4 5G | 13 f4 3H4 |
| NpIV | (84.8) | 5f4 | 8 | (17 589) | 38 f4 3M | 24 f4 5I | |
| NpIV | (84.8) | 5f4 | 2 | (18 254) | 22 f4 5F | 19 f4 3D1 | |
| NpIV | (84.8) | 5f4 | 5 | (18 396) | 44 f4 5F | 35 f4 5G | |