Time Scales and Dynamics of 3-He-Induced Multifragmentation

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

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

Folha rota, de Machado de Assis: mulheres livres e pobres na ordem patriarcal = Folha rota: free and poor women within patriarchal order

Este artigo analisa o conto Folha rota (1878), de Machado de Assis, levando-se em conta o processo de transformação do patriarcalismo, haja vista sua decadência no contexto de crescente urbanização durante o século XIX. Pautamo-nos na representação que a narrativa faz do cotidiano das personagens femininas para discutir as situações de violência vividas por mulheres livres e pobres envolvidas nas relações de poder inerentes àquela sociedade. Dessa forma, procuramos apontar tanto uma interpretação da obra literária como instrumento de crítica social quanto contribuir para a maior compreensão da obra deMachado de Assis, sobretudo de seus contos.<br><br>This article analyzes the short story Folha rota (1878) by Machado de Assis, taking to account the transformation process of the patriarchy, bearing in mind it’s decadence within the increasing urbanization context through 19th century. From the representation of female characters and their everyday’s life in the narrative, we discuss the violence experienced by free and poor women involved in the inherent power relations in that society. In this perspective, we intend to indicate an interpretation of literary work as an important device of social criticism, as much as, to give a contribution to an accurate comprehension of Machado de Assis’s work, especially his short stories