| Element |
References Discovery Identification |
Configuration | Term | J | E(cm-1) | |
| AcLXIII | (87.3) | (87.3) | 3p6.3d9 | 2D | 5/2 | 0 |
| AcLXIII | (87.3) | (87.3) | 3p6.3d9 | 2D | 3/2 | 1 310 600 ± 3 600 |
| AcLXIII | (87.3) | (87.3) | 3p5.3d10 | 2P | 3/2 | 5 284 300 ± 1 400 |
| AcLXIII | (87.3) | (87.3) | 3p5.3d10 | 2P | 1/2 | 11 614 600 ± 6 400 |