Abstract

Nucleon knockout reactions using fast rare isotope beams are a well-suited tool to study single-particle properties of exotic nuclei and the evolution of nuclear shell structure towards the drip-lines. In particular the sudden removal of two protons from an intermediate-energy neutron-rich projectile has been shown to proceed as a direct reaction. In addition to giving spectroscopic information, this type of reaction promises a rather unique tool assign spins by measuring the momentum distributions of the heavy reaction residues. In the present experiment, the heavy reaction residues were measured in coincidence with the removed. These more final-state-exclusive measurements are key for further validation of this direct reaction and its use for quantitative spectroscopy of highly neutron-rich nuclei.

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