Journal ArticleDOI
Multifragmentation of the remnant produced in the reaction of 1A GeV gold with carbon
J. A. Hauger,J. A. Hauger,P. Warren,P. Warren,Sebastiano Albergo,F. S. Bieser,F. P. Brady,Z. Caccia,D. Cebra,A. D. Chacon,J. L. Chance,Y. Choi,Y. Choi,Salvatore Costa,J. B. Elliott,M. L. Gilkes,Andrew S. Hirsch,E. L. Hjort,A. Insolia,M. Justice,D. Keane,J. C. Kintner,J. C. Kintner,V. Lindenstruth,V. Lindenstruth,M. A. Lisa,M. A. Lisa,H. S. Matis,M. A. McMahan,C. P. McParland,Wolfgang Müller,D. L. Olson,M. D. Partlan,M. D. Partlan,N. T. Porile,Renato Potenza,G. Rai,J. O. Rasmussen,H. G. Ritter,J. Romanski,J. Romanski,J. L. Romero,G.V. Russo,H. Sann,R. P. Scharenberg,A. Scott,Y. Shao,B. K. Srivastava,T. J. M. Symons,M. L. Tincknell,Cristina Tuve,S. Wang,H. H. Wieman,T. Wienold,and K. Wolf +54 more
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TLDR
In this article, a high-statistics exclusive study of the multifragmentation of 1A GeV gold on carbon has been performed and the yields for each stage are determined as a function of the event charged particle multiplicity m.Abstract:
A high-statistics exclusive study of the multifragmentation of 1A GeV gold on carbon has been performed. Particles with Z{le}2 show evidence of emission in a first prompt stage as well as in a second equilibrium stage whereas fragments with Z{ge}3 appear to be emitted essentially only in the second stage. Two methods for the separation of the Z{le}2 particles into the two stages are given and they are in agreement. The yields for each stage are determined as a function of the event charged particle multiplicity m. The mass, nuclear charge, excitation energy per nucleon, and temperature of the remnant left after the first stage and their fluctuations have been determined as a function of m. The expansion of the remnant to fragment freeze-out is examined. The freeze-out temperature is determined from double isotope ratios as a function of m and isentropic trajectories are obtained in the temperature-density plane. The caloric curve shows a monotonic increase with excitation energy. Some of the energy is in the form of radial flow. Overall, the results are consistent with a previous statistical analysis of the data which suggests that, over a certain range of excitation energies, multifragmentation involves a continuous phase transition. {copyright}more » {ital 1998} {ital The American Physical Society}« lessread more
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Journal ArticleDOI
Thermodynamical features of multifragmentation in peripheral Au + Au Collisions at 35 A.MeV
M. D'Agostino,A. S. Botvina,M. Bruno,Aldo Bonasera,J.P. Bondorf,R. Bougault,P. Désesquelles,P. Désesquelles,E. Geraci,Francesca Gulminelli,I. Iori,N. Le Neindre,Giacomo Vito Margagliotti,I. N. Mishustin,A. Moroni,A. Pagano,G. Vannini +16 more
TL;DR: In this paper, the distribution of fragments produced in events involving the multifragmentation of excited sources is studied for peripheral Au + Au reactions at 35 A MeV and an isotropic emission in its rest frame has been observed, indicating that an equilibrated system has been formed.
Journal ArticleDOI
Critical behavior in light nuclear systems: Experimental aspects
Yu-Gang Ma,J. B. Natowitz,R. Wada,K. Hagel,Jian-Song Wang,Th. Keutgen,Z. Majka,Michael Murray,L. Qin,P. Smith,Ruben Alfaro,J. Cibor,M. Cinausero,Y. El Masri,D. Fabris,E Fioretto,A.L. Keksis,M. Lunardon,A. Makeev,Nathalie Marie,E. Martin,Arnulfo Martínez-Dávalos,Arturo Alejandro Menchaca-Rocha,G. Nebbia,G. Prete,V. Rizzi,A. Ruangma,D.V. Shetty,G. A. Souliotis,P. Staszel,Martin Veselsky,G. Viesti,E. M. Winchester,Sherry Yennello +33 more
TL;DR: In this article, an extensive experimental survey of the features of the disassembly of a small quasi-projectile system with nuclei in the excitation energy range of 1-9 MeV/u has been carried out.
Journal ArticleDOI
Microscopic model approaches to fragmentation of nuclei and phase transitions in nuclear matter
J. Richert,P. Wagner +1 more
TL;DR: In this article, the properties of excited nuclear matter and the quest for a phase transition which is expected to exist in this system are the subject of intensive investigations, and the analysis of experimental data is confronted with two major problems, the setting up of thermodynamic equilibrium in a timedependent fragmentation process and the finite size of nuclei.
Journal ArticleDOI
Comparison of 1A GeV 197 Au+C data with thermodynamics: The nature of the phase transition in nuclear multifragmentation
R. P. Scharenberg,B. K. Srivastava,Sebastiano Albergo,F. S. Bieser,F. P. Brady,Z. Caccia,D. Cebra,A. D. Chacon,J. L. Chance,Y. Choi,Y. Choi,Salvatore Costa,J. B. Elliott,J. B. Elliott,M. L. Gilkes,J. A. Hauger,A. S. Hirsch,E. L. Hjort,A. Insolia,M. Justice,M. Justice,D. Keane,J. C. Kintner,J. C. Kintner,V. Lindenstruth,V. Lindenstruth,M. A. Lisa,M. A. Lisa,H. S. Matis,M. A. McMahan,C. P. McParland,C. P. McParland,Wolfgang Müller,D. L. Olson,M. D. Partlan,N. T. Porile,Renato Potenza,G. Rai,J. O. Rasmussen,H. G. Ritter,J. Romanski,J. Romanski,J. L. Romero,G.V. Russo,H. Sann,A. Scott,Y. Shao,Y. Shao,T. J. M. Symons,M. L. Tincknell,M. L. Tincknell,Cristina Tuve,S. Wang,P. Warren,P. Warren,H. H. Wieman,T. Wienold,T. Wienold,K.L. Wolf +58 more
TL;DR: In this paper, the Copenhagen statistical multifragmentation model (SMM) was used to identify high momentum ejectiles leaving an excited remnant of mass A, charge Z, and excitation energy E* which subsequently multifragments.
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