SATELLITE STRUCTURE OF THE XENON VALENCE SHELL BY ELECTRON-MOMENTUM SPECTROSCOPY

Momentum distributions and spectroscopic factors are obtained in a high-resolution electron-momentum spectroscopy study of xenon at 1000 eV. The shapes and relative magnitudes of the momentum profiles are in excellent agreement with distorted-wave (DW) impulse approximations using the target Dirac-Fock (DF) approximation. The DWDF approximation accurately describes the relative magnitudes of the 5p and 5s manifold cross sections as well as the shape of the 5s cross section. The use of nonrelativistic Hartree-Fock wave functions gives significantly poorer fits to the data. Spectroscopic factors for transitions belonging to the S-2(1/2)e, P-2(1/2,3/2)o, and 2D3/2,5/2e manifolds are assigned up to a separation energy of 45 eV. The spectroscopic strength for the lowest 5s transition is 0.345 +/- 0.010 whereas that for the ground-state 5p transition is 0.96 +/-0.02. The 5s strength in the continuum above 33.1 eV is 0.115 +/- 0.025 and that for the 5p manifold is only 0.03 +/-0.01. The first momentum profiles belonging to excited 2P(o) and 2D(e) manifolds are obtained. The latter, which must be entirely due to d-wave correlations in the xenon ground state, are in good agreement with DF 5d momentum profiles. Comparison is made with several many-body calculations and agreement with the latest relativistic calculation is good.