CHIMERA

 

Nucleus properties studied via Heavy Ion Collisions with the CHIMERA and FARCOS devices

One of the most interesting goals of the intermediate energy heavy ion research is to probe the properties of the nuclei under extreme conditions of density and temperature. The decay of the hot and compressed system formed in the collision can give information on the basic properties of the equation of state (EOS) of the nuclear matter. Moreover, the availability of Radioactive Ion Beams, with N/Z ratio very far from the stability valley, opened a new domain of research allowing to study the different effects of isotopic degree of freedom on the properties of nuclear matter. Due to the occurrence of different reaction mechanisms and to the large number of reaction products a complete experimental investigation needs an event by event analysis with an accurate determination of the primary properties of the decaying system, requiring the use of very performant detection devices.

The CHIMERA (Charged Heavy Ion Mass and Energy Resolving Array) device is a 4π array for charged particles with high granularity and large coverage of the solid angle, dedicated to the study of heavy-ion reactions at Fermi energies and successfully operating at the LNS from 2003 in its full configuration.
During these years different experimental campaigns were carried out by using stable beams and also radioactive ion beams delivered by the FRIBs facility at the LNS, following different research lines. Among them we can found the search for Isospin Effects on Formation and Decay Mechanism of Compound Nuclei, the study of Dynamical Effects on Nuclear Reactions, the search for Dynamical Fission, the study of Structure of Weakly Bound Light Nuclei. 
Apart from these experimental campaigns, in these years an intense R&D activity has been carried out in order to improve the identification performances of the device, thus opening new possibilities in the field of heavy ions reactions with stable and radiactive beams at lower energy.

The FARCOS ((Femtoscope ARray for COrrelations and Spectroscopy) device is a modular detection system, characterized by both high angular and energy resolution, and devoted to particle correlations studies, femtoscopy, spectroscopy and related applications. In its complete configuration FARCOS will consist of 20 modules, each one composed by a triple telescope with two double side silicon strip detectors followed by four CsI(Tl) crystal coupled to photodiodes.

Possible arguments for master Thesis are:

- Study of cluster structure of exotic 13B nuclei produced at FRIBS facility of LNS–Catania

- Measurement of nuclear density in heavy ion reaction at Fermi energies

- Study of pygmy resonance in radioactive beams excited with both isoscalar and isovector probes

- Research and development of a new modular device for charged particle and neutron detection with high angular resolution

- Dynamical processes in projectile break-up and intermediate mass fragments production at 20 A.MeV studied with the CHIMERA and FARCOS devices at LNS-CATANIA

- Effective interaction and dynamics of equilibration phenomena in the 48Ca+27Al system at 40 MeV/nucleon

More details are available here

For further information please contact Elena Geraci, Giuseppe Politi and Francesca Rizzo

Related links

CHIMERA/FARCOS web page at INFN - LNS

NEWCHIM page at INFN - CT,