| Element |
References Discovery Identification |
Configuration | Term | J | E(cm-1) | |
| AcIIIo | (57.3) | (57.3) | 5f | 2F | 5/2 | 23 454.5 |
| AcIIIo | (57.3) | (57.3) | 5f | 2F | 7/2 | 26 080.2 |
| AcIIIo | (57.3) | (57.3) | 7p | 2P | 1/2 | 29 465.9 |
| AcIIIo | (57.3) | (57.3) | 7p | 2P | 3/2 | 38 063.0 |