The rate of the exciton self-trapping in KI and RbI at different temperatures

The article disclosed the theory of the kinetics of excitons self-trapping in alkali halide crystals. On the example of KI and RbI crystals the time of excitons self-trapping and the length of free path before self-trapping were calculated. Also, the theory of self-trapping rate was revealed. Accord...

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Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.400 (5), p.52045-4
Main Authors: Zhanturina, N, Shunkeev, K
Format: Article
Language:English
Subjects:
Alkali halides
Compressing
Crystals
Data compression
Excitation
Excitons
Hydrostatic pressure
Luminescence
Mathematical analysis
Physics
Strain localization
Trapping
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Summary:The article disclosed the theory of the kinetics of excitons self-trapping in alkali halide crystals. On the example of KI and RbI crystals the time of excitons self-trapping and the length of free path before self-trapping were calculated. Also, the theory of self-trapping rate was revealed. According to the Arrhenius law the dependence of excitons self-trapping rate on the temperature and the degree of depth and uniaxial compression was analyzed. The increase of the rate of excitons self-trapping by temperature increasing was shown; while increasing the degree of compression at the full rate of strain localization decreases under uniaxial - is increasing. These data are good agreed with the experimental fact of luminescencei increasing under uniaxial compression and allow to make a conclusion about weakening of the luminescence by applying hydrostatic pressure.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/400/5/052045