Isospin effects in fragmentation reactions

J Benlliure,B Borderie,R Bougault,S Pirrone,A Pagano,G Politi

doi:10.1051/epjconf/20158800028

J Benlliure, B Borderie + Show 4 more

Open Access

https://doi.org/10.1051/epjconf/20158800028

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Abstract

Fragmentation reactions induced by relativistic heavy ions are characterized by large fluctuations in excitation energy and isospin. These features justifies the interest of this reaction mechanism for the production of nuclei far from stability. A particularly interesting reaction channel proving those fluctuations is the nucleon removal. Moreover, those processes are of interest to characterize the structural properties of the nuclei involved in the reactions.

Highlights

Peripheral or mid-peripheral heavy-ion collisions at kinetic energies above the Fermi energy and up to few GeVs per nucleon lead to the fragmentation of the projectile and target nuclei
In the first one we neglect the excitation energy gained by the pre-fragments in the knockout process, in the second one we consider the excitation energy according to the particle-hole picture for a potential depth of 40 MeV and in the third one we increase the excitation energy gained by the remnants by a factor two, according to the results presented in [30]
The renewed interest in fragmentation reactions is justified by the use of this reactions for the production of nuclei far from stability based on the in-flight production technique, the possibility to extend previous studies concerning the EOS and in particular, the symmetry energy using asymmetric nuclear matter, and because of the use of these reactions is some key applications as heavy-ion radiotherapy

Summary

Introduction

Peripheral or mid-peripheral heavy-ion collisions at kinetic energies above the Fermi energy and up to few GeVs per nucleon lead to the fragmentation of the projectile and target nuclei Such conditions justify the use of the participant-spectator picture [1] and the two-stage reaction scheme [2] for the description of this reaction mechanism. EPJ Web of Conferences setups are key features that justify the present importance of fragmentation reactions in nuclear physics research [4]. This reaction mechanism is, for example, well suited for the investigation of nuclear matter at extreme conditions. We will present recent results concerning the investigation of the most peripheral fragmentation reactions, nucleon removal, with projectiles covering a large range in isospin

Key features of fragmentation reactions

Production of nuclei far from stability

Proton removal channels

Sn beam mass number

Conclusions