| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.40933 | |||
| Specific gravity | 6.36 | g cm-3 | ||
| Minimum ionization | 1.193 | MeV g-1cm2 | 7.589 | MeV cm-1 |
| Nuclear collision length | 105.3 | g cm-2 | 16.56 | cm |
| Nuclear interaction length | 181.3 | g cm-2 | 28.51 | cm |
| Radiation length | 7.44 | g cm-2 | 1.170 | cm |
| Critical energy | 9.40 | MeV (for e-) | 9.08 | MeV (for e+) |
| Molière radius | 16.77 | g cm-2 | 2.637 | cm |
Plasma energy ![]() |
46.49 | eV | ||
| Muon critical energy | 172. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 53 | |||
| 80 | |||
| * calculated from mass fraction data. | |||