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EPR and ENDOR Investigations of an Oxygen Centre in CaF 2
Author(s) -
Fuchs H. J.,
Karthe W.,
Böttcher R.
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.2221100122
Subject(s) - electron paramagnetic resonance , oxygen , symmetry (geometry) , paramagnetism , anisotropy , spectral line , fluorine , diffusion , vacancy defect , irradiation , chemistry , materials science , crystallography , nuclear magnetic resonance , atomic physics , condensed matter physics , physics , nuclear physics , optics , metallurgy , geometry , thermodynamics , mathematics , organic chemistry , astronomy
A paramagnetic centre is produced in CaF 2 by oxygen diffusion and subsequent X‐irradiation. From EPR and ENDOR results it is possible to ascribe C 1 symmetry to this centre. The experimental data at measuring temperatures T ≦ 77 K can be fitted well to an oxygen‐fluorine‐vacancy complex. The anisotropy is averaged due to inner motions at room temperature and therefore in the spectra C 2v symmetry results.