4.5 Article

Determination of the coexistence curve, critical temperature, density, and pressure of bulk nuclear matter from fragment emission data

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PHYSICAL REVIEW C
卷 87, 期 5, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.87.054622

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  1. Office of Energy Research, Office of High Energy and Nuclear Physics, Division of Nuclear Physics, of the U.S. Department of Energy [DE-AC02-05CH11231, LLNL-JRNL-539511]
  2. U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]

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An analysis of six different sets of experimental data indicates that infinite, neutron-proton symmetric, neutral nuclear matter has a critical temperature of T-c = 17.9 +/- 0.4 MeV, a critical density of rho(c) = 0.06 +/- 0.01 nucleons/fm(3), and a critical pressure of p(c) = 0.31 +/- 0.07 MeV/fm(3). These values have been obtained by analyzing data from six different reactions studied in three experiments: two compound nuclear reactions, Ni-58+C-12 -> Se-70 and Ni-64+C-12 -> Se-76 (both performed at the LBNL 88-in. cyclotron); and four multifragmentation reactions, 1 GeV/c pi+Au-197 (performed by the Indiana Silicon Sphere Collaboration), 1 GeV/nucleon Au-197+C-12, 1 GeV/nucleon La-139+C-12, and 1 GeV/nucleon Kr-84+C-12 (all performed by the Equation of State Collaboration). The charge yields of all reactions as a function of the excitation energy were fit with a version of Fisher's droplet model modified to account for the dual components of the fluid (i.e., protons and neutrons), Coulomb effects, finite-size effects, and angular momentum arising from the nuclear collisions.

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