| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.42787 | |||
| Density | 5.29 | g cm-3 | ||
| Mean excitation energy | 454.5 | eV | ||
| Minimum ionization | 1.313 | MeV g-1cm2 | 6.944 | MeV cm-1 |
| Nuclear collision length | 93.4 | g cm-2 | 17.66 | cm |
| Nuclear interaction length | 156.4 | g cm-2 | 29.57 | cm |
| Pion collision length | 118.1 | g cm-2 | 22.33 | cm |
| Pion interaction length | 184.6 | g cm-2 | 34.89 | cm |
| Radiation length | 9.95 | g cm-2 | 1.881 | cm |
| Critical energy | 14.16 | MeV (for e-) | 13.71 | MeV (for e+) |
| Molière radius | 14.90 | g cm-2 | 2.816 | cm |
Plasma energy ![]() |
43.35 | eV | ||
| Muon critical energy | 237. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 57 | |||
| 35 | |||
| * calculated from mass fraction data. | |||