Quantity | Value | Units | Value | Units |
Atomic number | 90 | |||
Atomic mass | [232.0377(4)] | g mole-1 | ||
Specific gravity | 11.72 | g cm-3 | ||
Mean excitation energy | 847.0 | eV | ||
Minimum ionization | 1.098 | MeV g-1cm2 | 12.87 | MeV cm-1 |
Nuclear collision length | 117.7 | g cm-2 | 10.05 | cm |
Nuclear interaction length | 207.3 | g cm-2 | 17.68 | cm |
Pion collision length | 140.7 | g cm-2 | 12.01 | cm |
Pion interaction length | 233.6 | g cm-2 | 19.93 | cm |
Radiation length | 6.07 | g cm-2 | 0.5182 | cm |
Critical energy | 6.91 | MeV (for e-) | 6.66 | MeV (for e+) |
Molière radius | 18.64 | g cm-2 | 1.590 | cm |
Plasma energy ℏωp | 61.44 | eV | ||
Muon critical energy | 132. | GeV | ||
Melting point | 1408. | K | 1135. | C |
Boiling point @ 1 atm | 4404. | K | 4131. | C |