Napolitani, P. and Colonna, M. (2016) A non-equilibrium microscopic description of spallation. Il nuovo cimento C, 39 (6). pp. 1-7. ISSN 1826-9885
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Abstract
We investigate the prompt emission of few intermediate-mass fragments in spallation reactions induced by protons and deuterons in the 1GeV range. Such emission has a minor contribution to the total reaction cross section, but it may overcome evaporation and fission channels in the formation of light nuclides. The role of mean-field dynamics and phase-space fluctuations in these reactions is investigated through the Boltzmann-Langevin transport equation. We found that a process of frustrated fragmentation and re-aggregation is a prominent mechanism of production of IMFs which can not be assimilated to the statistical decay of a compound nucleus. Very interestingly, this process may yield a small number of IMF in the exit channel, which may even reduce to two, and be wrongly confused with ordinary asymmetric fission. This interpretation, inspired by nuclear-spallation experiments, can be generalised to heavy-ion collisions approaching the fragmentation threshold.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Nov 2020 20:53 |
| Last Modified: | 16 Nov 2020 20:53 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19726 |
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