OPTICAL AND DIELECTRIC PROPERTIES OF METALLIC CALCIUM, MODELED GENERALIZED OSCILLATOR STRENGTH FUNCTION OF CALCIUM, INTERACTION CROSS SECTIONS OF ELECTRONS, PROTONS, AND ALPHA PARTICLES WITH CALCIUM

interaction cross sections. An analysis of the optical and the dielectric properties of calcium, determined from the literature, was performed. The optical functions of calcium were used for a calculation of the energy loss function of calcium. The energy loss function of calcium was used for a calculation of the oscillator strengths of electrons from the shells of calcium atoms and the bands of metallic calcium. The function was also used for a calculation of the mean excitation energies of electrons from the shells and the bands of calcium. The mean excitation energy of electrons from the whole atoms of calcium was found equal to 172 eV. The oscillator strengths and the partial mean excitation energies were used for modeling the generalized oscillator strength (GOS) function of calcium. The GOS function of calcium was first constructed with the Dirac’s delta functions, and later with Gaussian functions adjusted for small and for large energy losses. The GOS function of calcium was used for a calculation of the energy loss and recoil energy differential interaction cross sections of charged particles with calcium. Calculations of the cross sections were performed for electrons, protons, and alpha particles. It was also shown tha