The paper is dedicated to investigation of possible ways of stabilizat
ion of the H centres created together with F and Mg+ centres in a proc
ess of decay of selftrapped exciton. As a main mode of the H centres s
tabilizationa capture of the K centre by magnesium-vacancy dipole and
creation of V-type centre was suggested. This process was theoreticall
y studied in the frames of model of molecular cluster which electron s
tructure was calculated by the semi-empirical version of the Hartree-F
ock method. For experimental corroboration of this process the relatio
ns between dependences of magnesium dipoles decrease on dose of gamma
irradiation and corresponding dose dependences of the Mg+, Mg-0, and F
centres radiation creation were used.