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 4p and 4s manifolds as well as giving a good representation of the shapes of the respective 4p and 4s cross sections. Results for the momentum profiles belonging to excited ²{P}ᵒ$ and $²Sᵉ manifolds are also presented. Spectroscopic factors for transitions belonging to the ²{P}ᵒ$ and $²Sᵉ manifolds are assigned up to a binding energy of 42 eV. The spectroscopic factor for the lowest 4s transition is 0.51±{}0.01, whereas that for the ground-state 4p transition is 0.98±{}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 4p and 4s manifold cross sections, that provides information on possible initial-state configuration-interaction effects in krypton. {} 1996 The American Physical Society.
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Nicholson et al. (1996) studied this question.