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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-density beams of electrons and calcium atoms, for incident electron energies from 8 to 500 eV. For each electron energy we have used 28 results obtained at different polarizer positions from 0-180 degrees to extract the required parameters. Excellent agreement between the present results and earlier predictions has been found.

Optical-Excitation Function and Polarization of 4227-Å Resonance Line of Ca Excited by 8-500 eV Electron Impact