Temperature and Pressure Dependence of the Optical Absorption and Luminescence of a Defect in TlCl

The luminescence associated with an absorption band at about 3.0 eV in chalcogen-doped TlCl has been observed. The temperature and pressure coefficients of the positions of the absorption and emission peaks have been found to have "anomalous" negative signs. The temperature coefficient of the absorption peak is dominated by the effect of thermal expansion, the band shifting toward the blue as the lattice expands. The emission peak exhibits very little temperature dependence. Some arguments are presented in favor of interpreting this band as an exciton band associated with an anion vacancy (α band) instead of an F band. Lattice relaxation may cause the emission to occur at Cl2− molecule-ions near the vacancy.This article is from Physical Review 159 (1967): 687, doi:10.1103/PhysRev.159.687. Posted with permission.</p

Polarization bremsstrahlung from non-relativistic electrons penetrating a polycrystalline target

The bremsstrahlung theory in polycrystalline medium is developed on the basis of a quantum approach derived earlier for a separate atomyesBelgorod State Universit

Polarization bremsstrahlung from non-relativistic electrons penetrating a polycrystalline target

yesThe bremsstrahlung theory in polycrystalline medium is developed on the basis of a quantum approach derived earlier for a separate atomBelgorod State Universit

Polarization premsstrahlung

yesThis paper briefly reviews the present state of the art of the microscopic theory of polarization bremsstrahlung at an isolated atom and in a condensend matter, in cristall included, are concidere

Polarization premsstrahlung

This paper briefly reviews the present state of the art of the microscopic theory of polarization bremsstrahlung at an isolated atom and in a condensend matter, in cristall included, are concideredye