Effect of temperature on electron spectra in the region of the intrinsic-absorption edge of CdGa{sub 2}Se{sub 4}

The results of investigation of the temperature dependence of CdGa{sub 2}Se{sub 4} absorption coefficient in the polarized radiation at 5-300 K and that of the emission intensity at 4.2-77 K are presented. The changes observed for the polarization dependence of absorption coefficient and the radiation intensity with decreasing temperature are attributed to a different velocity of motion of states of the valence-band top {Gamma}{sub 3} + {Gamma}{sub 4} and {Gamma}{sub 2} with changing tetragonal compression.