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Electron transfer within F center pairs in KCl from optical emission and absorption
Author(s) -
Mezger A. C.,
Jaccard C.
Publication year - 1981
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.2221070231
Subject(s) - atomic physics , radiative transfer , excitation , center (category theory) , inverse , luminescence , absorption (acoustics) , electron , population , physics , analytical chemistry (journal) , chemistry , materials science , optics , crystallography , mathematics , geometry , nuclear physics , chromatography , quantum mechanics , sociology , demography
Transient F luminescence and F′ population after F band excitation and the effect of a static magnetic field (0.5 T) are measured in KCl at 10 K for F center concentrations between 5 × 10 16 and 1 × 10 18 cm −3 . The results are explained by an F center pair model involving a radiative decay (time τ r ), direct and inverse non‐radiative electron transfers within the pair depending exponentially on the separation: τ = τ 0 exp ( r /λ), and a Poisson spatial distribution of the individual centers, with the following parameters: τ r = (890 ± 5) ns; τ 0 = (0.4 ± 0.2) ns, λ = (0.8 ± 0.1) nm (direct); τ 0i = (2 ± 1) ms, λ′ = (0.8 ± 0.1) nm (inverse).