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Energy Transfer Between A T and A X Minima in KBr: TI, Quantitative Four‐Level‐Model
Author(s) -
Hlinka J.,
Mihoková E.,
Nikl M.,
Polák K.,
Rosa J.
Publication year - 1993
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.2221750224
Subject(s) - metastability , radiative transfer , atomic physics , luminescence , energy transfer , energy (signal processing) , kinetics , materials science , maxima and minima , reaction rate constant , analytical chemistry (journal) , physics , chemistry , optics , quantum mechanics , chromatography , mathematical analysis , mathematics , optoelectronics
The decay kinetics of the A‐luminescence in KBr : TI is investigated in the wide temperature region from 4 to 500 K. In the decay of A T emission up to four components with different decay times can be resolved and in A X emission rise time components are found. For the first time the energy transfer between A T and A X emission bands is observed separately between metastable levels ( T = 30 to 40 K) and between radiative ones ( T = 60 to 120 K). The set of experimental data obtained is sufficient to determine the rate constants for radiative and nonradiative transitions introduced in the semiempirical four‐level model proposed.