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EPR Study of the Relaxed Excited State of F‐Centres in Alkali Halides
Author(s) -
Romanov N. G.,
Veshchunov Yu. P.,
Vetrov V. A.,
Baranov P. G.
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.2221100110
Subject(s) - hyperfine structure , electron paramagnetic resonance , excited state , envelope (radar) , chemistry , halide , laser linewidth , alkali metal , spectral line , wave function , atomic physics , physics , nuclear magnetic resonance , laser , inorganic chemistry , optics , quantum mechanics , telecommunications , radar , organic chemistry , computer science
EPR spectra in the relaxed excited state (RES) of F‐centres in isotope‐enriched crystals 41 KCl, 39 KCl, 85 RbCl, and 87 RbCl are studied by means of an optical detection technique. The EPR linewidth is established to be due to the hyperfine interactions of the F‐centre electron with the ligand nuclei. It is shown that the EPR data for the RES of F‐centres in alkali halides can be accounted for with a rather localised RES wavefunction. A hydrogenlike 2s wavefunction with the extremum in the region of the first coordination sphere is used as an envelope function. Additional lines in the optically detected spectra of F‐centres are studied.