Figure 2
The angular distribution of photoelectrons from He at the photon energy of 73 eV. The filled circles with error bars denote the experimental data points and the solid line shows the fitting result based on the inserted equation. θ is the angle of the ejected photoelectron relative to the horizontal axis, λ is the angle of tilt between the major axis of the polarization ellipse and the horizontal axis, and P is the degree of linear polarization. |