  The availability of high-intensity, heavy-ion beams coupled to sensitive,
large solid-angleacceptance spectrometers has enabled a detailed examination of
the fission fragments produced in induced-fission reactions. The
abrasion-fission process involves the formation of projectile-like prefragments
in violent nuclear collisions at relative energies in excess of 100 MeV/u. At
intermediate energies below this threshold, experiments suggest a change in the
prefragment kinematic qualities. Information regarding the influence of this
transitional phase upon the evolution of nuclei approaching the point of
scission is scarce. In this article, data are presented for over 200 nuclei
from nickel to palladium produced in abrasion-fission reactions of a 80 MeV/u
238U beam. Cross sections were obtained following yield measurements performed
for the principal charge states of the identified fission fragments and a
detailed analysis of the ion transmission. A full kinematic analysis of the
fission fragments has been performed using the LISE++ software package, where
the trajectory of an ion passing through a spectrometer can be reconstructed
based upon measurements at the focal plane. The results obtained at the S800
spectrograph are compared with predictions obtained with a three-fission
progenitor (3EER) model. Systematic studies of fission-fragment properties
continue to provide a valuable experimental benchmark for theoretical efforts
directed toward describing this complex decay channel, that is important in the
context of planning experiments to explore the neutron-rich region of the
nuclear chart at rare-isotope beam facilities.
