Abstract
Detailed studies of the luminescence of aquated Am 3+ are presented in the context of prior work on lanthanide and actinide ions. The luminescing state of aquated Am 3+ is confirmed to be 5D 1 based on observed emission and excitation spectra. The luminescence lifetime of Am 3+ in H 2O solution is (22±3) ns and (155±4) ns in D 2O solution at 295 K. Judd—Ofelt transition intensity theory qualitatively describes the observed Am 3+ relative integrated fluorescence intensities. Recent luminescence studies on complexed trivalent f-element ions in solution are reviewed as to the similarities and differences between the lanthanide ion 4f state and the actinide ion 5f state properties.
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