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Coulomb chronometry to probe the decay mechanism of hot nuclei

Abstract : In 129 Xe+ nat Sn central collisions from 8 to 25 MeV/A, the three-fragment exit channel occurs with a significant cross section. We show that these fragments arise from two successive binary splittings of a heavy composite system. The sequence of fragment production is determined. Strong Coulomb proximity effects are observed in the three-fragment final state. A comparison with Coulomb trajec-tory calculations shows that the time scale between the consecutive break-ups decreases with increasing bombarding energy, becoming quasi-simultaneous above excitation energy E * = 4.0±0.5 MeV/A. This transition from sequential to simultaneous break-up was interpreted as the signature of the onset of multifragmentation for the three-fragment exit channel in this system.
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Contributor : Diego Gruyer Connect in order to contact the contributor
Submitted on : Thursday, November 19, 2015 - 10:46:38 AM
Last modification on : Wednesday, January 19, 2022 - 3:02:06 PM
Long-term archiving on: : Friday, April 28, 2017 - 3:19:47 PM


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Diego Gruyer, J.D. Frankland, Eric Bonnet, A. Chbihi, G Ademard, et al.. Coulomb chronometry to probe the decay mechanism of hot nuclei. Physical Review C, American Physical Society, 2015, 92, pp.064606. ⟨10.1103/PhysRevC.92.064606⟩. ⟨in2p3-00867220v4⟩



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