Production of neutron-rich nuclei in fragmentation reactions of 132Sn projectiles at relativistic energies

TL;DR

This study investigates the fragmentation of neutron-rich 132Sn nuclei at relativistic energies, providing new data on production cross sections crucial for future rare-ion-beam facilities and understanding reaction mechanisms.

Contribution

First experimental analysis of medium-mass radioactive 132Sn fragmentation at relativistic energies, offering valuable data for neutron-rich nuclei production methods.

Findings

Measured production cross sections of residual nuclei.

Data relevant for two-stage reaction schemes.

Insights into the 'memory' effect in fragmentation.

Abstract

The fragmentation of neutron-rich 132Sn nuclei produced in the fission of 238U projectiles at 950 MeV/u has been investigated at the FRagment Separator (FRS) at GSI. This work represents the first investigation of fragmentation of medium-mass radioactive projectiles with a large neutron excess. The measured production cross sections of the residual nuclei are relevant for the possible use of a two-stage reaction scheme (fission+fragmentation) for the production of extremely neutron-rich medium-mass nuclei in future rare-ion-beam facilities. Moreover, the new data will provide a better understanding of the "memory" effect in fragmentation reactions.