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Electron‐Spin‐Resonance Study of Pb + (l) Centers of the Laser‐Active Structure in KCl and RbCl2)
Author(s) -
Heyndebickx I.,
Goovaerts E.,
Nistor S. V.,
Schoemaker D.
Publication year - 1986
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.2221360108
Subject(s) - vacancy defect , ion , electron paramagnetic resonance , crystallography , irradiation , oxygen , electron , atomic physics , chemistry , materials science , nuclear magnetic resonance , physics , nuclear physics , organic chemistry
Several Pb + defects possessing the so‐called laser‐active Pb + (l)‐type structure are examined by ESR in X‐irradiated KCl:PbCl 2 and RbCl:PbCl 2 crystals. The essential core of these centers consists of a substitutional Pb + ion associated with a nearest neighbor anion vacancy along a 〈100〉 direction. Small perturbations in the vicinity of this core in the form of a charge compensating cation vacancy or a neighboring Pb 2+ ‐cation vacancy complex generate a large number of Pb + (l)‐type defects, which are similar in KCl and RbCl. Different for both hosts, however, is the influence of oxygen on the production of some centers. In the RbCl crystals the presence of the oxygen ions modifies the structure of one of the defects and induces the production of two supplementary centers, while no effect of the O 2− ions is observed on the Pb + (1)‐type defects in KCl crystals.