  New (e, 2e) differential cross section measurements from krypton are
presented in the perpendicular plane, where the incident electron beam is
orthogonal to the scattered and ejected electrons that map out a detection
plane. New data were obtained at incident energies from 30 eV to 120 eV above
the ionization potential (IP), the experiment being configured to detect
scattered and ejected electrons with equal energy. The results are compared to
previous measurements from 2 eV to 50 eV above the IP and to calculations from
different models in this energy range. The new experiments confirm the results
from previous measurements. The results are also compared to recent data for
argon acquired under the same kinematic conditions, to highlight similarities
and differences that are observed.
