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On the Energy Transfer in the Thermally Annealed KCl: Pb 2+ , Eu 2+ System
Author(s) -
MuñozSantiuste J. E.,
GarcíaSolé J.,
Manfredi M.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221630119
Subject(s) - ion , annealing (glass) , energy transfer , excitation , luminescence , analytical chemistry (journal) , absorption (acoustics) , spectral line , thermal , absorption spectroscopy , materials science , phase (matter) , atomic physics , chemistry , optics , physics , optoelectronics , thermodynamics , metallurgy , organic chemistry , quantum mechanics , chromatography , astronomy , composite material
Pb → Eu energy transfer mechanisms in the thermally annealed KCl: Pb 2+ , Eu 2+ system are examined by means of optical absorption, emission, and time decay spectra of the luminescence. The thermal annealing produced the formation of the Pb 2+ Suzuki phase and the results show that the Eu 2+ ions enter this phase by substituting for some Pb 2+ ions. The Pb → Eu transfer is found to be a very efficient process, with a very short transfer time. The analysis of the time decay signals shows that the transfer is a single pair mechanism; no migration of the excitation energy is experimentally detected.