| Quantity | Symbol | Value | Unit | |
|---|---|---|---|---|
| Universal | ||||
| Planck constant | h bar | 1.055*^-34 | J s | |
| h | 6.626*^-34 | J s | ||
| h | 4.136*^-34 | eV s | ||
| (unified) atomic mass unit | u | 1.661*^-27 | kg | |
| Bohr magneton | μB | 927.4*^-26 | J T-1 | |
| Boltzmann constant | k | 1.381*^-23 | J K-1 | |
| electric constant | ε0 | 8.854*^-12 | F m-1 | |
| Joule in Hz h | J | 1.509*^-33 | Hz h | |
| Joule in eV | J | 6.242*^18 | eV | |
| elementary charge | e | 1.602*^-19 | C | |
| e | 4.803*^-10 | esu | ||
| electron mass | me | 9.108*^-31 | kg | |
| Bohr radius | a0 | 0.5292*^-10 | m | |
| Sodium | ||||
| mass in kg | m | 3.819*^-26 | kg | |
| mass in a.m.u. | m | 22.99 | a.m.u. | |
| wavelength | λ | 589.2*^-9 | m | |
| recoil frequency | νr | 25.01 | kHz | |
| recoil velocity | vr | 2.945 | cm/s | |
| linewidth | γ/2π | 10.01 | MHz | |
| lifetime | τ | 15.90*^-9 | s | |
| capture velocity | vc | 5.90 | m/s | |
| Doppler velocity | vD | 29.47 | cm/s | |
| Cesium | ||||
| mass | m | 133 | a.m.u. | |
| Rubidium | ||||
| mass | m | 85.47 | a.m.u. | |
| Miscellaneous | ||||
| Silicon density | m | 2.329 | g cm-1 | |