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Excitons Perturbed by a Sodium Ion in CsI:Na Crystal
Author(s) -
Kayal A.H.,
Mori Y.,
Rossel J.
Publication year - 1982
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.2221100113
Subject(s) - exciton , ion , excited state , atomic physics , polarization (electrochemistry) , absorption (acoustics) , sodium , chemistry , materials science , molecular physics , condensed matter physics , physics , organic chemistry , composite material
Abstract The emissions around 420 and 370 nm of CsI:Na excited by the UV absorption associated with the Na + ion are studied by measuring the temperature dependence of decay times, the magnetic circular polarization, and ESR by optical detection. The results suggest that the 420 nm band is due to a localized exciton adjacent to a substitutional Na + ion. The basic properties of the electronic structure and kinetics of the exciton are obtained. These results are discussed in relation with the self‐trapped excitons in CsI.