| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.50339 | |||
| Specific gravity | 1.30 | g cm-3 | ||
| Minimum ionization | 1.752 | MeV g-1cm2 | 2.286 | MeV cm-1 |
| Nuclear collision length | 64.7 | g cm-2 | 49.58 | cm |
| Nuclear interaction length | 96.1 | g cm-2 | 73.63 | cm |
| Radiation length | 27.07 | g cm-2 | 20.75 | cm |
| Critical energy | 52.20 | MeV (for e-) | 50.77 | MeV (for e+) |
| Molière radius | 11.00 | g cm-2 | 8.429 | cm |
Plasma energy ![]() |
23.35 | eV | ||
| Muon critical energy | 724. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| 17 | |||
| * calculated from mass fraction data. | |||