Quantity | Value | Units |
Value | Units |
Atomic number |
2 |
|
| |
Atomic mass |
4.002602(2) |
g mole-1 |
| |
Specific gravity
(20° C, 1 atm) |
1.663E-04 |
g cm-3 |
| |
Mean excitation energy |
41.8 |
eV |
| |
Minimum ionization |
1.937 |
MeV g-1cm2 |
3.222E-04 |
MeV cm-1 |
Nuclear collision length |
51.8 |
g cm-2 |
3.117E+05
| cm |
Nuclear interaction length |
71.0 |
g cm-2 |
4.269E+05
| cm |
Pion collision length |
79.5 |
g cm-2 |
4.778E+05
| cm |
Pion interaction length |
103.6 |
g cm-2 |
6.229E+05
| cm |
Radiation length |
94.32
| g cm-2 |
5.671E+05
| cm |
Critical energy |
257.13 |
MeV (for e-) |
252.23
| MeV (for e+) |
Molière radius |
7.78 |
g cm-2 |
4.677E+04
| cm |
Plasma energy ℏωp |
0.26 |
eV |
| |
Muon critical energy |
2352. |
GeV |
| |
Boiling point @ 1 atm |
4.220
| K |
-268.9
| C |
Index of refraction
(0° C, 1 atm, Na D) |
35.0
| (n-1)x106 |
|
| |
For muons,