Evolution of the decay mechanisms in central collisions of $Xe$ + $Sn$ from $E/A$ = 8 to 29 $MeV$ - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Year : 2013

Evolution of the decay mechanisms in central collisions of $Xe$ + $Sn$ from $E/A$ = 8 to 29 $MeV$

Abstract

Collisions of Xe+Sn at beam energies of $E/A$ = 8 to 29 $MeV$ and leading to fusion-like heavy residues are studied using the $4\pi$ INDRA multidetector. The fusion cross section was measured and shows a maximum at $E/A$ = 18-20 $MeV$. A decomposition into four exit-channels consisting of the number of heavy fragments produced in central collisions has been made. Their relative yields are measured as a function of the incident beam energy. The energy spectra of light charged particles (LCP) in coincidence with the fragments of each exit-channel have been analyzed. They reveal that a composite system is formed, it is highly excited and first decays by emitting light particles and then may breakup into 2- or many- fragments or survives as an evaporative residue. A quantitative estimation of this primary emission is given and compared to the secondary decay of the fragments. These analyses indicate that most of the evaporative LCP precede not only fission but also breakup into several fragments.

Dates and versions

in2p3-00736313 , version 1 (28-09-2012)

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A. Chbihi, L. Manduci, J. Moisan, Eric Bonnet, J.D. Frankland, et al.. Evolution of the decay mechanisms in central collisions of $Xe$ + $Sn$ from $E/A$ = 8 to 29 $MeV$. 11th International Conference on Nucleus-Nucleus Collisions (NN2012), May 2012, San Antonio, United States. pp.012099, ⟨10.1088/1742-6596/420/1/012099⟩. ⟨in2p3-00736313⟩
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