Аннотация:The behavior of the luminescence spectrum of solid solution Ni0.6Zn0.4O, in which two intense nar-
row lines were recently discovered, is investigated as a function of temperature. It is shown that the intensity of
one of the lines drops in accordance with the Mott law with increasing temperature in the range between 10 and
50 K. The lines experience broadening, and the ratio of their intensities changes. In addition, the lines shift
toward lower energies. This shift and broadening of both lines occur differently, suggesting that they are of dif-
ferent nature.