Publication Type
Journal
Journal Name
Physical Review A
Publication Date
Page Number
052703
Volume
75
Issue
5
Abstract
Absolute cross sections for electron-impact excitation of the dipole-allowed transitions S<sup>4+</sup> (3s<sup>2</sup> <sup>1</sup>S → 3s3p <sup>1</sup>P)and S<sup>5+</sup>(3s <sup>2</sup>S → 3p <sup>2</sup>P) were measured near threshold using the merged electron-ion beams energy-loss (MEIBEL) technique. Although the magnitude of the measured cross sections are in reasonable agreement with available theoretical data, the experimental data
indicate that the contributions of dielectronic resonances in the near-threshold region are underestimated by these calculations.
