| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.53800 | |||
| Density | 1.07 | g cm-3 | ||
| Mean excitation energy | 81.2 | eV | ||
| Minimum ionization | 1.917 | MeV g-1cm2 | 2.052 | MeV cm-1 |
| Nuclear collision length | 59.8 | g cm-2 | 55.89 | cm |
| Nuclear interaction length | 86.0 | g cm-2 | 80.36 | cm |
| Pion collision length | 87.2 | g cm-2 | 81.49 | cm |
| Pion interaction length | 117.9 | g cm-2 | 110.2 | cm |
| Radiation length | 34.65 | g cm-2 | 32.38 | cm |
| Critical energy | 72.90 | MeV (for e-) | 70.95 | MeV (for e+) |
| Molière radius | 10.08 | g cm-2 | 9.419 | cm |
Plasma energy ![]() |
21.86 | eV | ||
| Muon critical energy | 964. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 6 | |||
| 8 | |||
| 15 | |||
| * calculated from mass fraction data. | |||