| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.43761 | |||
| Density | 6.06 | g cm-3 | ||
| Mean excitation energy | 395.0 | eV | ||
| Minimum ionization | 1.336 | MeV g-1cm2 | 8.101 | MeV cm-1 |
| Nuclear collision length | 88.9 | g cm-2 | 14.67 | cm |
| Nuclear interaction length | 143.8 | g cm-2 | 23.72 | cm |
| Pion collision length | 115.5 | g cm-2 | 19.06 | cm |
| Pion interaction length | 176.1 | g cm-2 | 29.05 | cm |
| Radiation length | 9.13 | g cm-2 | 1.506 | cm |
| Critical energy | 12.90 | MeV (for e-) | 12.47 | MeV (for e+) |
| Molière radius | 15.01 | g cm-2 | 2.476 | cm |
Plasma energy ![]() |
46.93 | eV | ||
| Muon critical energy | 219. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 8 | |||
| 20 | |||
| 74 | |||
| * calculated from mass fraction data. | |||