  An extensive study of GeV light-ion-induced multifragmentation and its
possible interpretation in terms of a nuclear liquid-gas phase transition has
been performed with the Indiana Silicon Sphere (ISiS)4 pi detector array.
Measurements were performed with 5-15 GeV/c p, pbar, and pion beams incident on
$^{197}$Au and 2-5 GeV $^3$He incident on $^{nat}$Ag and $^{197}$Au targets.
Both the reaction dynamics and the subsequent decay of the heavy residues have
been explored. The data provide evidence for a dramatic change in the reaction
observables near an excitation energy of E*/A = 4-5 MeV per residue nucleon. In
this region, fragment multiplicities and energy spectra indicate emission from
an expanded/dilute source on a very short time scale (20-50 fm/c). These
properties, along with caloric curve and scaling-law behavior, yield a pattern
that is consistent with a nuclear liquid-gas phase transition.
