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Experimental studies of clustering & fragmentation phenomena in warm, dilute, asymmetric nuclear matter

PhD in experimental nuclear dynamics & thermodynamics

Over the last few decades, the study of heavy ion collisions with the INDRA charged particle multidetector has permitted major advances in the understanding of the dynamics and thermodynamics of nuclear matter, most notably: demonstrating the existence of different phases of nuclear matter; the study of transformations between these phases in the context of thermodynamics of finite systems; and deduction of in-medium transport properties of nuclear matter far from equilibrium. Nevertheless, a crucial element is missing from most of the experimental results available today: the chemical composition of the reaction products (isotopic resolution) can only be measured for the lightest nuclei with INDRA. We still do not know how neutrons are distributed among the many intermediate mass fragments (Z=5~20) produced by these collisions. For this reason the FAZIA and INDRA collaborations have developed an ambitious program using the coupling of these set-ups in order to perform the most complete measurement possible to date of the formation and decay of hot nuclei in these reactions. FAZIA provides isotopic identification for nuclei with Z≤25 with the resolution of a magnetic spectrometer but without any limit in acceptance. 12 blocks of FAZIA telescopes (192 telescopes in total) will replace the first rings of INDRA at the most forward angles in order to perform the experiments, which will be used to study: collision dynamics (in-medium transport properties of asymmetric matter); equation of state and phase transitions (symmetry energy); clusterization phenomena (in-medium structure effects); secondary decay of hot exotic nuclei (isospin dependence of the nuclear level density parameter). After a final commissioning experiment at LNS Catania in spring 2018, installation of FAZIA at GANIL and testing of the coupling with INDRA will take place in autumn 2018, with the first experimental campaign foreseen for 2019.

 

Expected skills: nuclear physics; C++ programming; autonomy; teamwork 


Contact :  John Frankland

GANIL, BP 5027, 14 076 Caen cedex 05


Tél. 02 31 45 46 28

 Fax : 02 31 45 44 21

e-mail : john.frankland _at_ganil.fr



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