| Line | Source | Max. | Effect of lowered pressure |
|---|---|---|---|
| 4071 | Fe (sub) | weakened throughout | |
| 4077 | Sr+ (ult) | strengthened in , weakened in and | |
| 4215 | Sr+ (ult) | strengthened in , weakened in and | |
| 4247 | Sc+ (?) | strengthened throughout range | |
| 4250 | Fe (sub) | weakened throughout | |
| 4455 | Ca (sub) | weakened throughout | |
| 4494 | Fe (sub) | weakened throughout |
The predicted changes in the line ratios with lowered pressure are therefore as follows:
The ratio
behaves in exact accordance with prediction, and
which decreases and then increases again, offers no evidence for or against the theory. The two remaining ratios, involving the two Sr+ lines, display a lack of agreement with theory for the
and