| Atomic Mass | Mass Excess |
| 153.957058224805 amu | -40.0 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | (2-) | ~2 S | EC | 0 | |
| Ground state | (9+) | 1.12 S 0.08 | EC | 100 | 10.1 |
| .1304 | (17+) | 35 US 3 | IT | 100 | .13 |
| Decay mode | Half-life | Gamma-ray energy (keV) | Intensity (%) |
| EC | 1.12 S 0.08 | 96.60 | 12.+- 3. |
| EC | 1.12 S 0.08 | 433.60 | 82.5+- 2.0 |
| EC | 1.12 S 0.08 | 694.70 | 96.4+- 2.0 |
| EC | 1.12 S 0.08 | 821.30 | 99.35 |