Electromagnetic dissociation and soft giant dipole resonance of the neutron-dripline nucleus 11Li
Review articleOpen access
Abstract:

AbstractThe electromagnetic dissociation (EMD) cross sections of light neutron-dripline projectile 11Li have been inferred from the target dependence of the interaction cross section, σ1, and the two-neutron-removal cross section, σ−2n, at an incident energy of 0.8 GeV/nucleon. The EMD cross sections of 11Li projectiles on a lead target were found to be quite large; σIEMD(11Li+Pb)=1.72 ±0.65b and σ−2nEMD(11Li+Pb)=0.89 ±0.10b, which are approximately 80 times larger than those of 12C projectiles after scaling the cross section by Zproj2. The large EMD cross section is related to the possible existence of a soft mode of the giant dipole resonance at low excitation energy in the extremely neutron-rich nuclei.

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