Luminescence and Dichroism of F and M Centers in Potassium Chloride

概要

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In order to determine the model of the M center, the luminescence and dichroism of additively colored KCl were studied in detail. The polarization factor of luminescence due to M centers excited with polarized light in the F band are P(π/4) = -0.37 and P(0) = -0.17. The F band as well as the M band becomes dichroic by irradiating with polarized light in the M band at room temperature or in the F band at low temperature, and the same quantitative relation exists between the amounts of dichroism in the F and M band for both cases. Above results do not contradict the hypothesis that the second M band overlaps with the F band, and if this assumption is granted, it is concluded from the experiment that the symmetry type of the M center is not C_<2v> but D_<2h>. The oscillator strengths were found to be 0.65 and 0.53 of that of the F band. If the emission due to M centers excited with light in the F band is assumed to be caused by the resonance transfer from F to M centers, in order to explain the experimental value of transfer probability, the distance between both centers must be less than the order of 10Å.
社団法人日本物理学会の論文
1958-09-05