| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.52148 | |||
| Density | 1.23 | g cm-3 | ||
| Minimum ionization | 1.867 | MeV g-1cm2 | 2.304 | MeV cm-1 |
| Nuclear collision length | 58.2 | g cm-2 | 47.17 | cm |
| Nuclear interaction length | 83.4 | g cm-2 | 67.58 | cm |
| Pion collision length | 85.6 | g cm-2 | 69.36 | cm |
| Pion interaction length | 115.4 | g cm-2 | 93.51 | cm |
| Radiation length | 43.32 | g cm-2 | 35.11 | cm |
| Critical energy | 88.74 | MeV (for e-) | 86.38 | MeV (for e+) |
| Molière radius | 10.35 | g cm-2 | 8.389 | cm |
Plasma energy ![]() |
23.12 | eV | ||
| Muon critical energy | 1134. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| * calculated from mass fraction data. | |||