| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.45665 | |||
| Specific gravity (20° C, 1 atm) | 1.50 | g cm-3 | ||
| Minimum ionization | 1.513 | MeV g-1cm2 | 2.270 | MeV cm-1 |
| Nuclear collision length | 75.2 | g cm-2 | 50.16 | cm |
| Nuclear interaction length | 117.5 | g cm-2 | 78.31 | cm |
| Pion collision length | 101.5 | g cm-2 | 67.66 | cm |
| Pion interaction length | 148.1 | g cm-2 | 98.76 | cm |
| Radiation length | 16.53 | g cm-2 | 11.02 | cm |
| Critical energy | 27.60 | MeV (for e-) | 26.80 | MeV (for e+) |
| Molière radius | 12.70 | g cm-2 | 8.467 | cm |
Plasma energy ![]() |
23.85 | eV | ||
| Muon critical energy | 418. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 6 | |||
| 9 | |||
| 35 | |||
| * calculated from mass fraction data. | |||