Abstract

Isotopically resolved fragments up to Z 20 have been studied in a test experiment by the FAZIA Collaboration with a three-stage telescope. The reactions 84Kr+112Sn (n-poor) and 84Kr+124Sn (n-rich) at 35 MeV/nucleon were measured. The telescope was located near the grazing angle, so the detected fragments are mainly emitted from the phase-space region of the projectile. In the following, evidences for isospin diffusion and drift will be discussed.

Highlights

  • The production of many fragments is one of the main features of heavyion reactions at bombarding energies higher than 15–20 MeV/nucleon

  • We show some results obtained bombarding with a 84Kr beam at 35 MeV/nucleon two targets with different isospin: 112Sn (n-poor system) and 124Sn (n-rich)

  • The systems 84Kr+112Sn and 84Kr+124Sn at 35 MeV/nucleon have been studied by the FAZIA Collaboration

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Summary

Introduction

The production of many fragments is one of the main features of heavyion reactions at bombarding energies higher than 15–20 MeV/nucleon. The study of the isospin content of fragments and light particles, gives clues on different processes of isospin transport: (a) isospin “diffusion”, related to the isospin asymmetry between the reacting nuclei (i.e. projectile and target are chosen with different N/Z values) [2, 3, 6, 7, 10]; (b) isospin “drift” (or “migration”), related to the density gradient which develops between the interacting nuclei, associated to the formation of a diluted “neck” [10,11,12,13]. We show some results obtained bombarding with a 84Kr beam at 35 MeV/nucleon two targets with different isospin: 112Sn (n-poor system) and 124Sn (n-rich)

The experiment and some results
Conclusion
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