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New scalings in nuclear fragmentation

Abstract : Fragment partitions of fragmenting hot nuclei produced in central and semiperipheral collisions have been compared in the excitation energy region 4-10 MeV per nucleon where radial collective expansion takes place. It is shown that, for a given total excitation energy per nucleon, the amount of radial collective energy fixes the mean fragment multiplicity. It is also shown that, at a given total excitation energy per nucleon, the different properties of fragment partitions are completely determined by the reduced fragment multiplicity (fragment multiplicity normalized to the source size). Freeze-out volumes seem to play a role in the scalings observed.
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Submitted on : Wednesday, September 1, 2010 - 2:43:31 PM
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E. Bonnet, B. Borderie, N. Le Neindre, Ad.R. Raduta, M.F. Rivet, et al.. New scalings in nuclear fragmentation. Physical Review Letters, American Physical Society, 2010, 105, pp.142701. ⟨10.1103/PhysRevLett.105.142701⟩. ⟨hal-00454499v2⟩



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