Here we present an explicit counterexample to the widely spread beliefs about an exclusive role of bimodality as the first order phase transition signal. On the basis of an exactly solvable statistical model generalizing the statistical multifragmentation model of nuclei we demonstrate that the bimodal nuclear fragment size distributions can naturally appear in infinite system without a phase transition. It appears at the supercritical temperatures due to the negative values of the surface tension coefficient. The developed statistical model corresponds to the compressible nuclear liquid with the tricritical endpoint located at one third of the normal nuclear density.
- Pub Date:
- April 2013
- Nuclear Theory;
- Condensed Matter - Statistical Mechanics
- Talk at XI International Scientific Conference of Students and Young Scientists "Shevchenkivska Vesna 2013", held in Kyiv, March 18-22, 2013