Quantity | Value | Units |
Value | Units |
Atomic number |
86 |
|
| |
Atomic mass |
[222.01758(2)] |
g mole-1 |
| |
Specific gravity
(20° C, 1 atm) |
9.066E-03 |
g cm-3 |
| |
Mean excitation energy |
794.0 |
eV |
| |
Minimum ionization |
1.116 |
MeV g-1cm2 |
1.011E-02 |
MeV cm-1 |
Nuclear collision length |
116.3 |
g cm-2 |
1.283E+04
| cm |
Nuclear interaction length |
204.3 |
g cm-2 |
2.253E+04
| cm |
Pion collision length |
139.4 |
g cm-2 |
1.537E+04
| cm |
Pion interaction length |
230.7 |
g cm-2 |
2.544E+04
| cm |
Radiation length |
6.28
| g cm-2 |
693.2
| cm |
Critical energy |
7.71 |
MeV (for e-) |
7.43
| MeV (for e+) |
Molière radius |
17.30 |
g cm-2 |
1908.
| cm |
Plasma energy ℏωp |
1.71 |
eV |
| |
Muon critical energy |
160. |
GeV |
| |
Melting point |
202.1 |
K |
-71.00
| C |
Boiling point @ 1 atm |
211.4
| K |
-61.70
| C |
For muons,