| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.55005 | |||
| Specific gravity | 1.04 | g cm-3 | ||
| Minimum ionization | 1.973 | MeV g-1cm2 | 2.052 | MeV cm-1 |
| Nuclear collision length | 58.5 | g cm-2 | 56.24 | cm |
| Nuclear interaction length | 83.4 | g cm-2 | 80.24 | cm |
| Radiation length | 36.51 | g cm-2 | 35.11 | cm |
| Critical energy | 78.85 | MeV (for e-) | 76.75 | MeV (for e+) |
| Molière radius | 9.82 | g cm-2 | 9.441 | cm |
Plasma energy ![]() |
21.79 | eV | ||
| Muon critical energy | 1033. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| 11 | |||
| 12 | |||
| 15 | |||
| 16 | |||
| 19 | |||
| * calculated from mass fraction data. | |||