| Element |
References Discovery Identification | Configuration | Term | J | E (cm-1) | |
| AcIe | (51.2) | (51.2) | 6d.7s2 | 2D | 3/2 | 0.00 |
| AcIe | (51.2) | (51.2) | 6d.7s2 | 2D | 5/2 | 2 231.43 |
| AcIe | (57.3) | (57.3) | 6d2(3F).7s | 4F | 3/2 | 9 217.28 |
| AcIe | (57.3) | (57.3) | 6d2(3F).7s | 4F | 5/2 | 9 863.59 |
| AcIe | (57.3) | (57.3) | 6d2(3F).7s | 4F | 7/2 | 10 906.02 |
| AcIe | (57.3) | (57.3) | 6d2(3F).7s | 4F | 9/2 | 12 078.07 |