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Table 1.

Strongest lines from Eu in optical window and assigned spectral ranges for detection (see text).

Nuclide Spectral line (Å) Spectral range (Å)
4594 4592–4596
Eu I 4627 4625–4629
4661 4659–4663

Eu II 4129 4127–4131
4205 4203–4207

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