| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.49731 | |||
| Density | 2.40 | g cm-3 | ||
| Mean excitation energy | 145.4 | eV | ||
| Minimum ionization | 1.684 | MeV g-1cm2 | 4.040 | MeV cm-1 |
| Nuclear collision length | 66.1 | g cm-2 | 27.53 | cm |
| Nuclear interaction length | 99.6 | g cm-2 | 41.50 | cm |
| Pion collision length | 92.7 | g cm-2 | 38.63 | cm |
| Pion interaction length | 130.5 | g cm-2 | 54.36 | cm |
| Radiation length | 25.66 | g cm-2 | 10.69 | cm |
| Critical energy | 47.48 | MeV (for e-) | 46.14 | MeV (for e+) |
| Molière radius | 11.46 | g cm-2 | 4.775 | cm |
Plasma energy ![]() |
31.48 | eV | ||
| Muon critical energy | 671. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 8 | |||
| 11 | |||
| 14 | |||
| 20 | |||
| * calculated from mass fraction data. | |||