OPTICAL-EXCITATION FUNCTION AND POLARIZATION OF 4227-ANGSTROM RESONANCE LINE OF CA EXCITED BY 8-500 EV ELECTRON-IMPACT

We report on measurements of the relative optical-excitation function for the 4(1)P state of Ca and polarization degree of the 4227-Angstrom resonance line. The measurements were carried out using crossed low-d ensity beams of electrons and calcium atoms, for incident electron ene rgies from 8 to 500 eV. For each electron energy we have used 28 resul ts obtained at different polarizer positions from 0-180 degrees to ext ract the required parameters. Excellent agreement between the present results and earlier predictions has been found.