Quantity | Value | Units | Value | Units |
Atomic number | 84 | |||
Atomic mass | [208.98243(2)] | g mole-1 | ||
Specific gravity | 9.320 | g cm-3 | ||
Mean excitation energy | 830.0 | eV | ||
Minimum ionization | 1.141 | MeV g-1cm2 | 10.63 | MeV cm-1 |
Nuclear collision length | 114.3 | g cm-2 | 12.27 | cm |
Nuclear interaction length | 200.2 | g cm-2 | 21.48 | cm |
Pion collision length | 137.6 | g cm-2 | 14.76 | cm |
Pion interaction length | 226.7 | g cm-2 | 24.32 | cm |
Radiation length | 6.16 | g cm-2 | 0.6611 | cm |
Critical energy | 7.33 | MeV (for e-) | 7.06 | MeV (for e+) |
Molière radius | 17.83 | g cm-2 | 1.913 | cm |
Plasma energy ℏωp | 55.77 | eV | ||
Muon critical energy | 140. | GeV |