| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.49955 | |||
| Density | 2.80 | g cm-3 | ||
| Minimum ionization | 1.686 | MeV g-1cm2 | 4.721 | MeV cm-1 |
| Nuclear collision length | 66.1 | g cm-2 | 23.60 | cm |
| Nuclear interaction length | 99.4 | g cm-2 | 35.51 | cm |
| Pion collision length | 93.0 | g cm-2 | 33.20 | cm |
| Pion interaction length | 130.8 | g cm-2 | 46.73 | cm |
| Radiation length | 24.03 | g cm-2 | 8.581 | cm |
| Critical energy | 44.20 | MeV (for e-) | 42.94 | MeV (for e+) |
| Molière radius | 11.53 | g cm-2 | 4.116 | cm |
Plasma energy ![]() |
34.08 | eV | ||
| Muon critical energy | 632. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 6 | |||
| 8 | |||
| 20 | |||
| * calculated from mass fraction data. | |||