Quantity | Value | Units | Value | Units |
Atomic number | 91 | |||
Atomic mass | [231.03588(2)] | g mole-1 | ||
Specific gravity | 15.37 | g cm-3 | ||
Mean excitation energy | 878.0 | eV | ||
Minimum ionization | 1.107 | MeV g-1cm2 | 17.02 | MeV cm-1 |
Nuclear collision length | 117.6 | g cm-2 | 7.651 | cm |
Nuclear interaction length | 207.0 | g cm-2 | 13.47 | cm |
Pion collision length | 140.6 | g cm-2 | 9.149 | cm |
Pion interaction length | 233.3 | g cm-2 | 15.18 | cm |
Radiation length | 5.93 | g cm-2 | 0.3861 | cm |
Critical energy | 6.77 | MeV (for e-) | 6.52 | MeV (for e+) |
Molière radius | 18.59 | g cm-2 | 1.209 | cm |
Plasma energy ℏωp | 70.90 | eV | ||
Muon critical energy | 130. | GeV | ||
Melting point | 1845. | K | 1572. | C |