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Comparison between the endor data of different superoxide ions in alkali halides
Author(s) -
Van Doorslaer S.,
Callens F.,
Maes F.,
Boesman E.,
Bouden D.
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.2221960121
Subject(s) - halide , ion , alkali metal , quadrupole , chemistry , hyperfine structure , impurity , hyperfine coupling , spectral line , analytical chemistry (journal) , atomic physics , inorganic chemistry , physics , organic chemistry , chromatography , astronomy
The ENDOR data of O − 2 in RbBr and KBr are compared with the ones in KCl for which two different types of O − 2 ions were reported earlier. Interactions with the nearest neighbour alkali ions could be detected. The corresponding hyperfine and nuclear quadrupole coupling tensors were determined. For all cases, the ENDOR spectra could be explained in terms of a monovacancy model, i.e. the O − 2 ion is replacing a single halide ion. One of the O − 2 defects in KCl was found to be completely analogous to the ones found in KBr and RbBr. The second type of O − 2 ion is also replacing a single halide ion and is believed to be perturbed by a nitrogen impurity.