Interplay between surface and volume instabilities in heavy-ion collisions examined within mean-field extensions

Napolitani, P. and Dinh Viet, H. and Colonna, M. (2022) Interplay between surface and volume instabilities in heavy-ion collisions examined within mean-field extensions. Il nuovo cimento C, 45 (3). pp. 1-7. ISSN 1826-9885

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Abstract

In the transition from nuclear matter to finite nuclei, complex finitesize effects which characterise open systems arise, in relation with either the nuclear surface or the bulk. In addition, the non-equilibrium character of the process, typical of violent heavy-ion collisions (from Fermi energy to the intermediate-energy domain) adds up as well. The resulting dynamics is the combination of surface and volume unstable modes which trigger large-amplitude fluctuations. A rich variety of fragmentation patterns may emerge, ranging from collimated streams of nuclear clusters to the split of a stretched nuclear complex into few large fragments. They imply different conditions of density and surface tension, and result in different chronologies. Such phenomenology has been observed in experiments, but it is often difficult to recognise and disentangle the underlying types of instabilities. To draw some example, two extremely deformed nuclear systems, produced below and above Fermi energy, are chosen and followed microscopically all along their evolution within the Boltzmann-Langevin One-Body approach.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	30 Jun 2022 14:37
Last Modified:	30 Jun 2022 14:37
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21935

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