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Raman scattering in crystals of α-sulphur at liquid helium temperatures

Raman scattering (RS) spectra of the crystalline (alpha) - sulphur are investigated at room and liquid helium temperatures. The doublets and quartets are found in the RS- spectrum at helium temperature in a frequency range, corresponding to the intramolecular vibrations. An explanation of the observed splitting is given with a help of the group theory analysis of intramolecular vibrations, affected by the crystalline field. The shifts of the spectral position of characteristic peaks in the RS-spectrum of the (alpha) -sulphur are measured with the temperature variation.