[en] The method of optical dichroism has been used to detect optical absorption bands of Vsub(k)-centers with maxima in 390 nm (halt-width delta=0.36 eV) and in about 750 nm. Comparison of the temperature dependences of the processes of reorientation and disintegration of Vsub(k)-centers permits to make the conclusion that the zero-degree migration of Vsub(k)-centers is the prevalent type of diffusion in CsBr. A quantitative analysis of the thermoluminescence Vsub(k)-peak has made it possible to determine the activation energy of hopping diffusion (epsilon=0.27 eV)