| Atomic Mass | Mass Excess |
| 153.924422475657 amu | -70.400 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | 0+ | 3000000 Y 1500000 | A | 100 | 2.947 |
There is no gamma-rays or the intensities are so weak!