Premium
Luminescent associates of indium ions with interstitials and vacancies in an x‐irradiated KCl: In crystal
Author(s) -
Aceves R.,
Flores M. Barboza,
Nagirnyi V.,
Salas R. Perez,
Usarov A.,
Zazubovich S.
Publication year - 1996
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.2221950213
Subject(s) - indium , irradiation , luminescence , ion , materials science , crystal (programming language) , crystallography , radiochemistry , chemistry , optoelectronics , physics , nuclear physics , computer science , organic chemistry , programming language
The spectral, polarization, and kinetic characteristics of luminescence are studied for In + and In 2+ ions associated with interstitials and vacancies in an X‐irradiated KCl: In crystal. It is shown that the 2.08 eV emission is caused by the electronic transitions from the tetragonal minima of the triplet relaxed excited state of an In + ion perturbed by an interstitial halide atom (H centre) and a cation vacancy v c − . The emission bands peaking in the region from 1.9 to 1.7 eV are ascribed to various types of associates of an In 2+ ion with v c −or with v c −and one or two H centres. It is concluded that the anisotropic impurity colour centres studied are produced by X‐irradiation mainly on the basis of the In 3+ v c −dipoles existing in the nonirradiated KCl:In crystal due to the changeable valence of indium. The processes of the production, destruction, and mutual transformation of the impurity colour centres of various types are studied in the temperature range from 4.2 to 400 K.