Coincidence study of excitation of cadmium atoms by electron impact

We present experimental values of the electron impact coherence parameters (EICP) and reduced Stokes parameters for excitation of 51P1 state of cadmium atoms. The results have been obtained using electron-photon coincidence technique for incident electron energies 80 eV and 60 eV and electron scattering angles in the range of 5 deg. to 50 deg. We also present an additional set of data for electron energy 100 eV and scattering angle 50 deg. which complements our previous results. All the experimental values are compared with theoretical relativistic distorted-wave approximation (RDWA) calculations. The first Born approximation (FBA) predictions of the alignment angle are also presented. The theoretical results are in good qualitative agreement with the experimental data