Investigation of RS spectra of crystalline potassium perchlorate

The processes of molecular relaxation in crystalline potassium perchlorate are investigated by the method of RS spectroscopy in the field of totally symmetrical oscillation v₁(A) of the amen ClO ₄ ⁻ . The parameters of reorientation in relation to the polarized RS lines are evaluated from the temperature dependences of line widths. It is established that in KClO₄ the reorientation represents the activation process. Time correlation functions are obtained and the times of vibrational and orientational relaxation are determined, which show that with an increase in temperature the contribution of homogeneous broadening increases while that of the inhomogeneous one remains practically unchanged. Kh. I. Amirkhanov Institute of Physics at the Dagestan Center of the Russian National Academy of Sciences, 26 Bakinskikh Komissarov St., 94, Makhach-Kala, 367003. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 6, pp. 932–935, November–December, 1998.