| Atomic Mass | Mass Excess |
| 134.9059714684 amu | -87.587 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | 7/2+ | 2300000 Y 300000 | B- | 100 | .269 |
| 1.6329 | 19/2- | 53 M 2 | IT | 100 | 1.633 |
| Decay mode | Half-life | Gamma-ray energy (keV) | Intensity (%) |
| IT | 53 M 2 | 787.2 | 100 |
| IT | 53 M 2 | 846.1 | 96 |