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Aggregation Processes in the NaCl:Eu 2+ , Mn 2+ System and Energy Transfer Mechanisms
Author(s) -
Cywiński R.,
Fava R.,
Manfredi M.,
Mugeński E.
Publication year - 1987
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.2221430205
Subject(s) - annealing (glass) , ion , energy transfer , chemistry , activation energy , analytical chemistry (journal) , crystallography , materials science , chemical physics , metallurgy , organic chemistry , chromatography
Energy transfer processes are studied in NaCl:Eu 2+ , Mn 2+ samples, along the annealing treatments that are performed at RT and at 100 °C; the Eu ions and/or Eu aggregates act as donors and Mn ions and/or Mn aggregates act as acceptors. For the samples annealed at RT, a single pair transfer mechanism is evidenced at the early annealing stages, while at late annealing stages a fast energy migration in the donor system followed by a phonon assisted transfer is observed. For the annealing at 100 °C at late aggregation stages the most probable transfer process seems to be connected to a slow energy diffusion in the donor system followed by the transfer to the acceptors. The Mn 2+ emission band, that is detectable as a consequence of the EuMn transfer shows a complex behaviour.