| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.42976 | |||
| Density | 2.40 | g cm-3 | ||
| Mean excitation energy | 354.4 | eV | ||
| Minimum ionization | 1.346 | MeV g-1cm2 | 3.230 | MeV cm-1 |
| Nuclear collision length | 87.1 | g cm-2 | 36.28 | cm |
| Nuclear interaction length | 140.0 | g cm-2 | 58.32 | cm |
| Pion collision length | 113.4 | g cm-2 | 47.26 | cm |
| Pion interaction length | 171.5 | g cm-2 | 71.47 | cm |
| Radiation length | 9.72 | g cm-2 | 4.049 | cm |
| Critical energy | 14.03 | MeV (for e-) | 13.59 | MeV (for e+) |
| Molière radius | 14.69 | g cm-2 | 6.120 | cm |
Plasma energy ![]() |
29.27 | eV | ||
| Muon critical energy | 234. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 9 | |||
| 74 | |||
| * calculated from mass fraction data. | |||