| Atomic Mass | Mass Excess |
| 154.922618921099 amu | -72.080 MeV |
| Level energy (MeV) | Spin & parity | Half-life | Mode of decay | Branch ratio (%) | Decay energy (MeV) |
| Ground state | 3/2- | STABLE | 0 | ||
| .121 | 11/2- | 31.97 MS 0.27 | IT | 100 | .121 |
| Decay mode | Half-life | Gamma-ray energy (keV) | Intensity (%) |
| IT | 31.97 MS 0.27 | 13.47 | 7.1+- 0.3 |
| IT | 31.97 MS 0.27 | 86.545 | 70 |