THE (E,2E) SPECTRA OF ARGON

Accurate measurements of the binding energy spectrum and momentum dist ribution of argon are performed using the high resolution (Delta E = 1 .4 eV, Delta p = 0.1 a.u.) energy multichannel (e, 2e) spectrometer (t heta(1) = theta(2) = 45 degrees, phi = 0 degrees - +/- 30 degrees) bui lt recently in our laboratory. Detailed satellite structure of argon h as been observed. Good agreement can be found between the experimental data and the theoretical calculations performed using Hartree-Fock me thod with the different basis sets and configuration interaction metho d.