| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.59020 | |||
| Density | 0.660 | g cm-3 | ||
| Minimum ionization | 2.174 | MeV g-1cm2 | 1.435 | MeV cm-1 |
| Nuclear collision length | 55.7 | g cm-2 | 84.38 | cm |
| Nuclear interaction length | 77.6 | g cm-2 | 117.5 | cm |
| Pion collision length | 83.4 | g cm-2 | 126.2 | cm |
| Pion interaction length | 109.4 | g cm-2 | 165.7 | cm |
| Radiation length | 45.08 | g cm-2 | 68.27 | cm |
| Critical energy | 107.43 | MeV (for e-) | 104.65 | MeV (for e+) |
| Molière radius | 8.90 | g cm-2 | 13.48 | cm |
Plasma energy ![]() |
17.99 | eV | ||
| Muon critical energy | 1344. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| * calculated from mass fraction data. | |||