The following nuclear g factors are used in CFOUR by default:
| hydrogen | 2.792847386 (spin 1/2) |
| helium | 0 |
| lithium | 3.25646253 (spin 3/2) |
| berylium | -1.177492 (spin 3/2) |
| bor | 2.6886489 (spin 3/2) |
| carbon | 0 |
| nitrogen | 0.40376100 (spin 1) |
| oxygen | 0 |
| fluorine | 2.628868 (spin 1/2) |
| neon | 0 |