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Project List » Study of nuclear systems populated in multifragmentation reactions at intermediate energies

Study of nuclear systems populated in multifragmentation reactions at intermediate energies
proiecte.nipne.ro/pn2/36-projects.html


Acronym: MULTIFRAGM
Contracting Authority: Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI)
Number / Date of the contract: 294 / 01.10.2007
Idei
Project Manager: Apostol Buta
Partners:
Starting date / finishing date: 2007-10-01 / 2010-09-30
Project value: 1000000 RON
Abstract: Heavy ion collisions at velocities close to the Fermi velocity of nucleons in nuclei (v~c/4)is a very good tool to study nuclear matter properties at extreme temperature and densities. These sudies have shown that the excited nuclei prepared in this way can decay either by emitting few big fragments (Z>=5) or by many light particles with Z<5 (evaporation). The transition with energy between these decay modes is analogous with the liquid-gas phase transition. In order to investigate such a transition in nuclear reactions we propose to measure the energy and momentum for fragments (charge identified) and light particles (charge and mass identified), emitted in nuclear reactions: Xe+Sn and Gd+U. From the measured quantities we will try to reconstruct the excitation enegy and temperature of the original nuclei and obtain in this way the phase-transition diagram for these nuclear systems.

Objectives:

THE STAGES OF THE PROJECT AND DELIVERY DATES
1. The determination of the asymetry term using multifragmentation reactions (2007-12-15)
2. Freeze-out topology of multifragmentation events (2008-09-27)
3. Fragment velocity correlations from single-source events at Fermi energies (2009-09-15)
4. The distorsion of the electric field due to heavy ions in silicon detectors (2010-08-27)
RESULTS
PUBLISHED ARTICLES
RESEARCH TEAM


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