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Chapter 14 APPLICATION OF ULTRAVIOLET/VISIBLE MOLECULAR ABSORPTION SPECTROMETRY - page 18 / 33

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Absorption by Lanthanide and Actinide Ions

The ions of most lanthanide and actinide elements absorb in the ultraviolet and visible regions. Their spectra consist of narrow, well-defined, and characteristic absorption peaks. The transitions responsible for absorption by elements of the lanthanide series appear to involve the various energy levels of 4f electrons, while it is the 5f electrons of the actinide series that interact with radiation.

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