| Atomic Mass | Mass Excess |
| 143.913643016539 amu | -80.441 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | 0+ | 284.893 D 0.008 | B- | 100 | .319 |
| Decay mode | Half-life | Gamma-ray energy (keV) | Intensity (%) |
| B- | 284.893 D 0.008 | 80.120 | 1.36+- 0.06 |
| B- | 284.893 D 0.008 | 133.5150 | 11.09+- 0.20 |