| Atomic Mass | Mass Excess |
| 251.084917360448 amu | 79.10 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | 4.0 M 0.5 | EC | >=90.00 | 0 | |
| Ground state | 4.0 M 0.5 | A | <=10.00 | 8.07 |
There is no gamma-rays or the intensities are so weak!