| Atomic Mass | Mass Excess |
| 255.09323196167 amu | 86.845 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | (1/2+) | 3.1 M 0.2 | A | 61 | 8.442 |
| Ground state | (1/2+) | 3.1 M 0.2 | EC | 39 | 0 |
| Decay mode | Half-life | Gamma-ray energy (keV) | Intensity (%) |
| A | 3.1 M 0.2 | 187.20 | 3.4+- 1.6 |