  A novel pathway for the formation of multi-particle-multi-hole (np-mh)
excited states in rare isotopes is reported from highly energy- and
momentum-dissipative inelastic-scattering events measured in reactions of an
intermediate-energy beam of 38Ca on a Be target. The
negative-parity,complex-structure final states in 38Ca were observed following
the in-beam gamma-ray spectroscopy of events in the 9Be(38Ca,38Ca+gamma)X
reaction in which the scattered projectile lost longitudinal momentum of order
p = 700 MeV/c. The characteristics of the observed final states are discussed
and found to be consistent with the formation of excited states involving the
rearrangement of multiple nucleons in a single, highly-energetic
projectile-target collision. Unlike the far-less dissipative, surface-grazing
reactions usually exploited for the in-beam gamma-ray spectroscopy of rare
isotopes, these more energetic collisions appear to offer a practical pathway
to nuclear-structure studies of more complex multi-particle configurations in
rare isotopes - final states conventionally thought to be out of reach with
high-luminosity fast-beam-induced reactions.
