Abstract
The spin-orbit splitting of electron energy levels in semiconductor alloys is considered at both the Gamma and Lambda points. It is shown that the spin-orbit splitting Delta 0 is decreased by alloying and the magnitude and composition dependence of this decrease are successfully accounted for. Arguments are presented to account for the negative bowing of the spin-orbit splitting at Gamma , and a moderately successful empirical expression for the magnitude of this bowing is introduced.