The (e, 2e) Spectra of Argon

Accurate measurements of the binding energy spectrum and momentum distribution of argon areperformed using the high resolution (ΔE = 1.4 eV, Δp = 0.1 a.u.) energy multichannel (e, 2e) spectrometer (θ₁ = θ₂ = 45°,  = 0°- ±30°) built recently in our laboratory. Detailed satellite structure of argon has been observed. Good agreement can be found between the experimental data and the theoretical calculations performed using Hartree- Fock method with the different basis sets and configuration interaction method.