Abstract
Measurement of emission and excitation spectra of the luminescent band peaked at 397 nm of the mercurous chloride single crystals has been performed. This emission has been observed below the phase transition temperature. From the observed azimuthal dependence of the degree of polarization of the luminescence it was concluded that the luminescent centres are oriented in [001] direction. It is assumed that the luminescent centres are formed by Hg0 atoms, which interact strongly in the excited state with the surrounding ions of chlorine.
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