Doronin Y. Relaxation of the electron excitations in single-component and two-component inert gas nanoclusters

In the dissertation the results of the study of mechanisms of radiation decay of the electron excitation in single- and two-component Ar-, Kr- and Xe-based nanoclusters as well as of the rules of the cluster formation in the supersonic jet adiabatically expanding into a vacuum are given. The pattern of heterogeneous nucleation in the Ar-Kr and Ar-Xe nanoclusters, starting from its earliest stages, has been diagnosed. The evidences of the existence of radial segregation in the volume of heterogeneous nanoclusters, which leads to the formation of a core from the heavier component in nanoclusters, were obtained. The evolution of exciton-impurity complexes in xenon nanoclusters with small argon impurity, which emit at wavelengths corresponding to free exciton emission in Xe cryorystals, was studied. A new approach to the quantitative analysis of the integral emission intensity of localized excitons of the type of oscillatory-relaxed excimer molecules (Rg2)* and (Rg4+)* formed in the neutral and ionic argon, krypton and xenon nanoclusters respectively was considered and applied. Two regions of medium-sized clusters characterized by a quasicrystalline phase with a fifth-order symmetry axis (which is a structure of a multilayered icosahedron) and a crystalline FCC phase are identified.