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Table 3

Selected prominent transitions from the lowest four energy levels for O-like ions.

Ion Lower level Upper level λ0 (Å)
Fe XIX 13.42
13.52 (g)
13.74
108.36 (g)
109.95
119.98
592.24 (g, f)
1118.06 (g, f)

Ca XIII 131.22
161.74 (g)
648.70 (f)
1133.76 (g, f)

Ar XI 151.85
188.81 (g)
745.95 (f)
1392.10 (g, f)

S IX 46.61
47.25 (g)
55.54
56.33
179.28
224.73 (g)
871.73 (f)
1715.41 (g, f)

Si VII 217.83
275.36 (g)
1049.15 (f)
2147.40 (g, f)

Mg V 276.58
353.09 (g)
1324.43 (f)
2783.58 (g, f)

Ne III 379.31
489.50 (g)
1814.63 (f)
3869.85 (g, f)

Notes. The rest-frame wavelengths (λ0 in Å) are taken from the CHIANTI atomic database. Ground transitions are labelled with (g). Forbidden transitions are labelled with (f).

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