| H-
and He-like Ions |
| Photoexcitation |
| Radiative
Decay |
| continuum |
| continuum |
| ⋮ |
| ⋮ |
| 5 |
| 5 |
| 4 |
| 4 |
| 3 |
| 3 |
| 2 |
| 2 |
| n = 1 |
| n = 1 |
| l =
s p d f g |
| |
| |
| l =
s p d f g |
|
|
| Recombination/ |
|
| Radiative
Cascade |
|
| Photoionization |
| continuum |
| continuum |
| ⋮ |
| ⋮ |
| 5 |
| 4 |
| 4 |
| 3 |
| 3 |
| 2 |
| 2 |
| n = 1 |
| n = 1 |
| |
| l =
s p d f g |
| |
| l =
s p d f g |