Emission of Intermediate Mass Fragments Normal to the Fission Axis in Hot Heavy Nuclei

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Complex Fragment Emission in Coincidence with Angle-Correlated Fission Fragments in the 270 MeV 3-He + 232-Th System

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Exclusive Studies of Charged-Particle Emission in 1-H and 3-He-Induced Reactions on Heavy Nuclei

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Emissioin of Intermediate Mass Fragments During Fission

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Multifragmentation in the 1.8 - 4.8 GeV 3-He + nat-Ag, 197-Au Reactions

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Multifragmentation of 197-Au by 5.0 - 14.6 GeV/c Proton and pi- Beams

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Light-Ion-Induced Multifragmentation: The ISiS Project

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.Comment: 67 pages, 44 figures, all included in tar fil