Electron - photon polarization correlation study of the state of Ca atoms excited by electron impact

Measurements are reported for the polarization of the fluorescence arising from the excitation of the state of Ca atoms detected in coincidence with electrons scattered with a suitable energy loss. The excitation parameters have been determined at an electron incidence energy of 100 eV for five scattering angles between and . Calculations for the measured parameters are also performed using the relativistic distorted-wave approximation. The theoretical results are presented and compared with the experimental data.