| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.39996 | |||
| Specific gravity | 11.0 | g cm-3 | ||
| Minimum ionization | 1.147 | MeV g-1cm2 | 12.58 | MeV cm-1 |
| Nuclear collision length | 106.8 | g cm-2 | 9.743 | cm |
| Nuclear interaction length | 180.8 | g cm-2 | 16.49 | cm |
| Radiation length | 6.65 | g cm-2 | 0.6068 | cm |
| Critical energy | 7.89 | MeV (for e-) | 7.60 | MeV (for e+) |
| Molière radius | 17.88 | g cm-2 | 1.632 | cm |
Plasma energy ![]() |
60.33 | eV | ||
| Muon critical energy | 147. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 8 | |||
| 92 | |||
| * calculated from mass fraction data. | |||