Energy-momentum structure of the krypton valence shell by electron-momentum spectroscopy

Momentum distributions and spectroscopic factors are obtained in a high-resolution electron-momentum spectroscopy study of krypton at 1000 eV. The shapes and relative magnitudes of the momentum profiles are in good agreement with the results of calculations made within the distorted-wave impulse approximation (DWIA) framework. The DWIA describes the relative magnitudes of the 4{ital p} and 4{ital s} manifolds as well as giving a good representation of the shapes of the respective 4{ital p} and 4{ital s} cross sections. Results for the momentum profiles belonging to excited {sup 2}{ital P}{sup {ital o}} and {sup 2}{ital S}{sup {ital e}} manifolds are also presented. Spectroscopic factors for transitions belonging to the {sup 2}{ital P}{sup {ital o}} and {sup 2}{ital S}{sup {ital e}} manifolds are assigned up to a binding energy of 42 eV. The spectroscopic factor for the lowest 4{ital s} transition is 0.51{plus_minus}0.01, whereas that for the ground-state 4{ital p} transition is 0.98{plus_minus}0.01. Comparisons of the present binding energies and spectroscopic factors are made against the results of several many-body calculations and photoelectron spectroscopy results. In addition, we outline a procedure, utilizing the experimental 4{ital p} and 4{ital s} manifold cross sections, that provides information on possible initial-state configuration-interaction effects in krypton. {copyright} {ital 1996 The American Physical Society.}