Spectra and decay times of the luminescences observed from chelated rare earth ions
Emission spectra and decay times of the benzoylacetonate, acetylacetonate, and dibenzoylmethide chelates of trivalent samarium, europium, terbium, and dysprosium are reported. The groups of spectral lines observed from these compounds in rigid organic glasses and excited by ultraviolet light are given probable J-J assignments. The luminescence decay curves are analyzed in terms of a two-step decay mechanism and a lower limit of 5 x 10/sup 6/ sec/sup -1/ was established for the intramolecular energy transfer rate constant. The nature of the donor level in the energy transfer process is discussed. Further evidence for quenching of the 4f electronic excited states of chelated rare-earth ions by a vibronic mechanism is presented. (auth)
- Research Organization:
- New Mexico. Univ., Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(29-1)-789
- NSA Number:
- NSA-17-031980
- OSTI ID:
- 4682136
- Report Number(s):
- CONF-37-4; SCDC-3299
- Resource Relation:
- Conference: American Chemical Society Meeting, Southwest Regional, Dallas, TX (United States), 6-8 Dec 1962; Other Information: For Sandia Corp., Albuquerque, N. Mex.; From American Chemical Society Meeting, Dallas, Texas, December 1963. Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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