Optical-excitation function and polarization of 4227-A resonance line of Ca excited by 8-500 eV electron Impact

摘要

We report on measurements of the relative optical-excitation function for the 4~1 P state of Ca and polarization degree of the 4227-A resonance line. The measurements were carried out using crossed low-density beams of elec- Trons 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 deg to extract the required parameters. Excellent agree- ment between the present results and earlier predictions has been found.