Exciton Lines in Luminescence Spectra of NixZn1-xO under Inner Shell Excitation

AbstractThe paper presents the results of the study of two narrow luminescence lines I1 and I2 at the energies of 3.339 and 3.393eV respectively in NiO and solid state solution Ni0.6Zn0.4O. The luminescence spectroscopy with a sub-nanosecond time resolution upon selective photoexcitation in the energy range of absorption of the inner shells Zn M- and Ni L2,3- edges of Zn- and Ni- ions was used to promote proposed earlier mechanism of origin of luminescence lines I1 and I2. Photoluminescence decay kinetics of NiO and solid state solution Ni0.6Zn0.4O under soft x-ray excitation are discussed. The doublet of I1 and I2 lines is believed to arise due to the radiative annihilation of p-d excitons

Simulation of formation of an intensive electron beam in bipolar electron-optical system with the plasma anode

The algorithm of numerical simulation of electrons sources in base of the high-voltage glow discharge with the anode plasma, taking into account change of the form and the location of a surface of anode plasma, that renders essential influence on formation of an ion stream, which at hit on the cold cathode as a result of secondary ion - electronic emission forms an electron beam, is offered. As against other algorithms the offered physics-mathematical model takes into account influence on distribution of potential not only an ion space charge, but also a space charge of beam electrons, distribution of potential in turn defines as a trajectory the beam electrons and a stream of ions, and position of plasma edge which movement is considered during formation of a beam according to Stefan's condition