v 2 6 O ct 1 99 8 A model for nuclear matter fragmentation : phase diagram and cluster distributions
نویسندگان
چکیده
We develop a model in the framework of nuclear fragmentation at thermodynamic equilibrium which can be mapped onto an Ising model with constant magnetization. We work out the thermodynamic properties of the model as well as the properties of the fragment size distributions. We show that two types of phase transitions can be found for high density systems. They merge into a unique transition at low density. An analysis of the critical exponents which characterize observables for different densities in the thermodynamic limit shows that these transitions look like continuous second order transitions.
منابع مشابه
- th / 9 80 50 03 v 1 2 M ay 1 99 8 A model for nuclear matter fragmentation : phase diagram and cluster distributions
We develop a model in the framework of nuclear fragmentation at thermodynamic equilibrium which can be mapped onto an Ising model with constant magnetization. We work out the thermodynamic properties of the model as well as the properties of the fragment size distributions. We show that two types of phase transitions can be found for high density systems. They merge into a unique transition at ...
متن کاملA model for nuclear matter fragmentation: phase diagram and cluster distributions
We develop a model in the framework of nuclear fragmentation at thermodynamic equilibrium which can be mapped onto an Ising model with constant magnetization. We work out the thermodynamic properties of the model as well as the properties of the fragment size distributions. We show that two types of phase transitions can be found for high density systems. They merge into a unique transition at ...
متن کامل- th / 9 51 00 59 v 1 2 9 O ct 1 99 5 Optimized δ expansion for the Walecka model
The optimized δ-expansion is used to study vacuum polarization effects in the Walecka model. The optimized δ-expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. Vacuum effects on self-energies and the energy density of nuclear matter are studied up to O(δ 2). When exchange diagrams are neglected, ...
متن کاملar X iv : n uc l - th / 9 60 50 10 v 1 8 M ay 1 99 6 Hyperon - rich Matter Jürgen
The phase diagram of nuclear matter offers fascinating features for heavy ion physics and astrophysics when extended to strangeness and antimatter. We will discuss some regions of this phase diagram as strange matter at zero temperature, hypermatter at high densities and the antiworld at high densities and strangeness fraction. 1 Strange Matter and Hypermatter Relativistic heavy ion collisions ...
متن کاملar X iv : a st ro - p h / 98 10 45 6 v 1 2 8 O ct 1 99 8 AGB stars in binaries and their progeny
An AGB star in a binary system is likely to pollute its companion with carbon-and s-process-rich matter. After the AGB star has faded into an unconspicuous white dwarf, the polluted companion enters the zoo of stars with chemical peculiarities. In this paper, the progeny of AGB stars in binary systems are identified among existing spectroscopic classes (Abell 35-like, binary post-AGB, WIRRing, ...
متن کامل