| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.55279 | |||
| Density | 1.03 | g cm-3 | ||
| Mean excitation energy | 76.7 | eV | ||
| Minimum ionization | 1.979 | MeV g-1cm2 | 2.039 | MeV cm-1 |
| Nuclear collision length | 58.8 | g cm-2 | 57.06 | cm |
| Nuclear interaction length | 83.9 | g cm-2 | 81.43 | cm |
| Pion collision length | 86.3 | g cm-2 | 83.75 | cm |
| Pion interaction length | 115.8 | g cm-2 | 112.4 | cm |
| Radiation length | 35.35 | g cm-2 | 34.32 | cm |
| Critical energy | 76.64 | MeV (for e-) | 74.60 | MeV (for e+) |
| Molière radius | 9.78 | g cm-2 | 9.497 | cm |
Plasma energy ![]() |
21.74 | eV | ||
| Muon critical energy | 1009. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 1 | |||
| 7 | |||
| 8 | |||
| 16 | |||
| 58 | |||
| * calculated from mass fraction data. | |||