| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.52130 | |||
| Specific gravity | 1.85 | g cm-3 | ||
| Minimum ionization | 1.803 | MeV g-1cm2 | 3.336 | MeV cm-1 |
| Nuclear collision length | 63.2 | g cm-2 | 34.18 | cm |
| Nuclear interaction length | 93.0 | g cm-2 | 50.28 | cm |
| Radiation length | 27.42 | g cm-2 | 14.82 | cm |
| Critical energy | 53.99 | MeV (for e-) | 52.49 | MeV (for e+) |
| Molière radius | 10.77 | g cm-2 | 5.820 | cm |
Plasma energy ![]() |
28.30 | eV | ||
| Muon critical energy | 749. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| 12 | |||
| 15 | |||
| 16 | |||
| 20 | |||
| 30 | |||
| * calculated from mass fraction data. | |||