학술논문
Coulomb chronometry to probe the decay mechanism of hot nuclei
Document Type
Working Paper
Author
Gruyer, Diego; Frankland, J D.; Bonnet, Eric; Chbihi, A; Ademard, G; Boisjoli, M; Borderie, B; Bougault, R; Galichet, E; Gauthier, J; Guinet, D; Lautesse, P; Neindre, N Le; Legouée, E; Lombardo, I; Lopez, O; Manduci, L; Marini, P; Mazurek, K; Nadtochy, P.; Pârlog, M; Rivet, M. F.; Roy, R.; Rosato, E; Spadaccini, G; Verde, G; Vient, E; Vigilante, M; Wieleczko, J. P.
Source
Phys. Rev. C 92, 064606 (2015)
Subject
Language
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$\pm$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.
Comment: 12 pages; 13 Figures; 4 Table; Accepted for publication in Physical Review C
Comment: 12 pages; 13 Figures; 4 Table; Accepted for publication in Physical Review C